Forte Advanced Diesel Treatment

Forte Advanced Formula Diesel Treatment

One bottle.
Ten components.
Every service.

From the fuel tank to the DPF — Forte Advanced Formula Diesel Treatment is a complete diesel injector cleaner and fuel system additive that cleans and maintains every critical component in your diesel fuel system in a single bottle added to a full tank.

Order — £16 → How it works
★★★★★
Free UK delivery · Compatible with diesel and biodiesel up to B30 · Use at every service
Forte Advanced Formula Diesel Treatment bottle — complete diesel fuel system treatment cleaning all 10 components
Is your diesel system overdue a clean?
💨
Increased black smoke from exhaust
Black smoke is a sign of incomplete combustion — usually caused by dirty injectors producing a poor spray pattern. More unburnt fuel means more soot, more DPF loading and more emissions.
Forte Diesel Treatment can help
📉
Reduced power or poor throttle response
Contaminated injectors that cannot deliver a precise spray pattern reduce combustion efficiency. The engine produces less power from the same amount of fuel and response feels sluggish.
Forte Diesel Treatment can help
⚠️
DPF loading quickly or warning light returning
Dirty injectors produce excessive soot which loads the DPF faster than normal. A contaminated EGR valve cannot close properly during regeneration. Both cause progressive DPF problems.
Forte Diesel Treatment can help
⛽
Increased fuel consumption
Poor injector spray patterns mean the engine has to work harder to produce the same power. Combustion becomes less efficient, more fuel is needed and running costs increase.
Forte Diesel Treatment can help
The problem

Upstream Contamination Triggers Downstream Catastrophe

Every diesel system component from the injector to the DPF is connected. Contamination at one point causes problems everywhere downstream. A dirty injector is never just a dirty injector.

Modern diesel engines are precision systems where every component depends on every other. The high pressure injection system atomises fuel at pressures of up to 2,000 bar — any contamination or deposit on the injector tip changes the spray pattern, changes combustion, increases soot production and changes exhaust composition.

That increased soot loads the DPF faster. The changed exhaust composition affects the EGR system. The contaminated EGR valve can no longer close properly during DPF regeneration, preventing exhaust temperatures from rising enough to burn off the soot. The DPF loads faster and regenerates less effectively — a progressive deterioration that started with a dirty injector.

Forte Advanced Formula Diesel Treatment addresses the entire chain — cleaning injectors, maintaining the EGR valve, reducing combustion chamber deposits and supporting DPF regeneration in one treatment added to the fuel tank.

Upstream contamination triggers downstream catastrophe — showing how dirty diesel injectors cause a chain reaction of problems including increased soot production, DPF loading, EGR contamination and failed DPF regeneration
The complete system treatment

What Does Forte Advanced Formula Diesel Treatment Do?

One bottle added to a full fuel tank travels through the entire diesel system treating all 10 critical components from tank to exhaust.

Forte Advanced Formula Diesel Treatment is not an injector cleaner. It is a complete diesel system treatment — cleaning, lubricating and protecting every component the fuel passes through.

As the treated fuel travels through the system, the active formulation cleans deposits from every surface it contacts. Injector spray patterns are restored. Combustion chamber deposits are reduced. EGR valve cleanliness is maintained. The turbo boost valve is kept clean. And cleaner combustion means less soot reaching the DPF.

The product also increases diesel lubricity up to 46% — lubricating the high pressure pump, injectors and all moving fuel system components to reduce wear and extend their operating life.

Physiological engine benefits and performance metrics — showing the measurable performance improvements from Forte Advanced Formula Diesel Treatment including restored injector spray patterns, improved combustion efficiency, reduced black smoke and lower DPF loading
1
Fuel Tank
Prevents micro-organism build-up and fuel degradation
2
High Pressure Pump
Cleans, lubricates and protects against wear
3
Pressure Regulator
Maintains correct fuel pressure throughout system
4
Injectors
Restores and maintains precision spray patterns
5
Inlet Valves
Reduces carbon and deposit build-up on valve faces
6
Combustion Chamber
Reduces carbon deposits for cleaner, more efficient combustion
7
Exhaust Valves
Reduces deposit build-up on exhaust valve faces
8
Turbo Boost Valve
Maintains cleanliness for correct boost operation
9
EGR Valve
Maintains cleanliness for correct operation and DPF regeneration
10
DPF / Catalyst
Cleaner combustion means less soot and more effective regeneration
The 10-point restoration journey — showing how Forte Advanced Formula Diesel Treatment travels through all 10 diesel system components from fuel tank through high pressure pump, pressure regulator, injectors, inlet valves, combustion chamber, exhaust valves, turbo boost valve, EGR valve and DPF catalyst
Key benefits

What Are the Benefits of Forte Advanced Formula Diesel Treatment?

  • ✓
    Cleans and lubricates entire diesel fuel system From tank to exhaust in one treatment — not just the injectors
  • ✓
    Restores and maintains injector spray patterns Precise spray patterns restore combustion efficiency, power and economy
  • ✓
    Increases diesel lubricity up to 46% Lubricates high pressure pump, injectors and all fuel system moving parts to reduce wear
  • ✓
    Reduces black smoke emissions Cleaner combustion means less unburnt fuel and less particulate emissions
  • ✓
    Maintains EGR valve and variable vane turbo cleanliness Both essential for DPF regeneration and engine performance
  • ✓
    Prevents micro-organism build-up in fuel Particularly important for vehicles that sit unused for extended periods
  • ✓
    Compatible with diesel and biodiesel up to B30 Safe for all modern diesel engines running standard or bio-blended fuels
The DPF connection

Will Forte Advanced Formula Diesel Treatment Help My DPF?

Yes — but not directly. It helps by fixing the upstream problems that cause DPF issues in the first place.

DPF problems are almost always caused by what happens before the DPF. Dirty injectors produce poor spray patterns causing incomplete combustion — more soot reaches the DPF and loads it faster than normal. A contaminated EGR valve cannot close fully during regeneration, preventing exhaust temperatures from rising to the level needed to burn off the soot.

Forte Advanced Formula Diesel Treatment addresses both. Clean injectors restore combustion quality, reducing soot production. A clean EGR valve closes correctly during regeneration, allowing exhaust temperatures to rise and regeneration to complete effectively.

For the best results with DPF issues use Forte Advanced Formula Diesel Treatment alongside Forte DPF Cleaner & Regenerator — the Diesel Treatment fixes the upstream causes while the DPF Cleaner directly lowers the soot burn temperature to aid regeneration.

The baseline requirement for successful DPF regeneration — showing how clean injectors and a clean EGR valve are both essential prerequisites for DPF regeneration to complete successfully, and how Forte Advanced Formula Diesel Treatment maintains both
Diagnostic codes

What Diesel Fault Codes Are
Linked to Dirty Injectors & Fuel?

When diesel injectors clog with deposits they stop atomising fuel properly — combustion suffers, soot rises and the fuel system runs out of spec. Forte Advanced Formula Diesel Treatment restores the injector spray pattern and cleans the fuel system. If you're seeing these alongside rough running, smoke or poor economy, dirty injectors are a likely contributor.

  • P0087
    P0088
    Fuel Rail / System Pressure Too Low or High Injector deposits and a dirty fuel system disrupt the pressure the rail can hold and deliver. Cleaning the injectors and fuel system helps restore correct fuelling. Persisting after treatment? Check the pump, regulator and sensor. Secondary code.
  • P0201
    –P0204
    Injector Circuit / Contribution (Cylinder 1–4) Often points to an injector that isn't delivering correctly. Where the cause is deposits and poor atomisation rather than an electrical fault, cleaning the injectors can restore balance. A genuinely failed injector needs replacement. Secondary code.
  • P2002
    P2463
    DPF Efficiency / Soot Accumulation Poorly atomised fuel from dirty injectors burns dirty and dumps more soot into the DPF. Cleaning the injectors for a cleaner burn reduces soot at source. For an already-loaded DPF, pair with Forte DPF Cleaner. Secondary code.
  • P0401
    EGR Insufficient Flow Carbon and soot from dirty combustion clog the EGR system. A cleaner burn produces less of the soot that blocks it. Heavy carbon already present may still need mechanical cleaning. Secondary code.

Seeing these on a diesel? Treatment works best as regular maintenance, before deposits build up enough to set codes. If a code persists after treatment, get the injectors and fuel system diagnosed. Ask Phil if unsure.

Primary application — add one bottle of Forte Advanced Formula Diesel Treatment to a full fuel tank at every service for complete diesel system maintenance
Instructions

How To Use Forte Advanced Formula Diesel Treatment

Add one bottle to a full fuel tank at every service. That's all — the product does the rest as the engine runs normally.

Add one bottle of Forte Advanced Formula Diesel Treatment to a full fuel tank. As the engine runs the treated fuel travels through all 10 system components, cleaning and maintaining each one. No dismantling, no specialist equipment, no additional time.

Common questions

Every question about
Forte Advanced Formula Diesel Treatment, answered.

What are the symptoms of dirty diesel injectors?
Dirty diesel injectors produce a poor spray pattern causing incomplete combustion. Common symptoms include increased black or grey exhaust smoke, reduced power and throttle response, poor fuel economy, rough running at idle, increased DPF loading and — in more severe cases — DPF warning lights and limp mode as soot overwhelms the filter faster than it can regenerate.
How do I know if my diesel injectors need cleaning or replacing?
Symptoms like black smoke, poor throttle response, rough idle and worsening fuel economy usually point to contaminated injectors that respond to chemical cleaning. If a treatment and a few tanks of fuel make no difference — or a cylinder has a confirmed injector fault code and misfire — the injector may be mechanically worn and need professional cleaning or replacement. Regular use keeps healthy injectors from reaching that point.
Does it work as a fuel injector cleaner?
Yes — cleaning and maintaining injector spray patterns is one of the 10 functions of Forte Advanced Formula Diesel Treatment. However it is more than just an injector cleaner. It treats the entire diesel system from tank to DPF in a single treatment. For severely blocked injectors professional ultrasonic cleaning may be needed, but regular use of Forte Advanced Formula Diesel Treatment prevents injectors from reaching that state.
Can I use it with my DPF or AdBlue system?
Yes — Forte Advanced Formula Diesel Treatment is compatible with DPF and AdBlue SCR equipped vehicles. It actually helps both systems work more effectively by improving combustion quality. Use alongside Forte DPF Cleaner & Regenerator for the complete diesel aftertreatment maintenance package.
Will it improve my fuel economy?
Restored injector spray patterns and cleaner combustion can improve fuel economy. The product also increases diesel lubricity up to 46% which reduces friction in the high pressure pump and injector system. The degree of improvement depends on how contaminated the system was before treatment — vehicles with heavily contaminated injectors typically see more noticeable improvement.
Is it compatible with biodiesel?
Yes. Forte Advanced Formula Diesel Treatment is compatible with diesel and biodiesel up to B30. This covers all commonly available diesel fuels in the UK market including the B7 biodiesel blend (7% biodiesel) now standard at UK forecourts.
Should I use it if I have a turbo diesel engine?
Yes — turbo diesel engines particularly benefit from Forte Advanced Formula Diesel Treatment. The product maintains the turbo boost valve and EGR valve cleanliness, both of which are critical for correct turbo operation. For additional turbo protection use alongside Forte Diesel Turbo Cleaner to directly address carbon deposits on variable vane turbo vanes.

One bottle.
Ten components.
Every service.

Forte Advanced Formula Diesel Treatment is the simplest way to maintain your entire diesel system — add to a full tank at every service. Free UK delivery.

£16

Order Forte Diesel Treatment — £16 →
The complete diesel maintenance package
Complete diesel system maintenance

Use alongside these products.

Add to fuel tank alongside
Forte DPF Cleaner & Regenerator
Forte Diesel Treatment fixes the upstream causes of DPF problems — clean injectors and EGR. Forte DPF Cleaner & Regenerator directly lowers the soot burn temperature. Use both together for the complete DPF maintenance approach.
View Forte DPF Cleaner & Regenerator →
Use as a twin pack
Forte Diesel Turbo Cleaner
Forte recommends using Forte Diesel Turbo Cleaner and Forte Diesel Treatment together at every service. Clean injectors reduce the source of carbon deposits on turbo vanes. Forte Diesel Turbo Cleaner removes the deposits already there.
View Forte Diesel Turbo Cleaner →
Before your MOT
Forte Diesel Emissions Reducer
If your diesel has failed or is at risk of failing its MOT emissions test, use Forte Diesel Emissions Reducer 100-200 miles before the test. Use Forte Diesel Treatment at every service to maintain low emissions year-round.
View Forte Diesel Emissions Reducer →

Take A Look At Our 5 Star Reviews For Forte Seal Conditioner

At BMW Tool Rental, we pride ourselves on providing excellent customer service and offering honest and reliable advice to our customers. We understand that when it comes to your car, you want to ensure that you are using the right products and getting the right advice. That's why we take the time to listen to our customers, understand their concerns, and provide the best possible solution.

Our forte seal conditioner has received numerous 5-star reviews from our satisfied customers, who have found our product to be effective in reducing engine oil leaks and stopping blue smoke caused by worn valve seals. However, we don't just rely on product reviews to show our commitment to customer satisfaction. We offer a personal touch that sets us apart from other retailers.

If you have any questions about our products or services, we encourage you to reach out to us. We're always happy to help and provide you with the information you need to make the right decision. Whether you're looking to rent our AGA valve seal tool or purchase our forte seal conditioner, we're here to help.

Diesel symptoms

Black Smoke, Diesel Misfire, Rough Idle and Hesitation

Black smoke from a diesel exhaust usually means the engine is burning too much fuel for the air available, or the fuel is not being atomised cleanly. Dirty diesel injectors are a common contributor because a poor spray pattern leaves larger droplets of fuel in the cylinder. Those droplets burn late or incompletely, which creates soot, rough idle, hesitation under acceleration, higher DPF loading and a flat-feeling engine.

That is why diesel smoke, diesel misfire, diesel rough idle and hesitation under acceleration often appear together. The injector may still be electrically alive, but deposits around the nozzle can distort the spray enough to upset combustion. A sticking EGR valve can make the same pattern worse by changing the air mix and feeding more soot back into the inlet.

Forte Advanced Formula Diesel Treatment is most relevant when the symptoms point to contamination rather than a broken part. It is added to a full fuel tank and is verified in the product facts as cleaning and maintaining the diesel fuel chain, including the fuel tank, high-pressure pump, pressure regulator, injectors, inlet valves, combustion chamber, exhaust valves, turbo boost valve, EGR valve and DPF/catalyst. It also increases diesel fuel lubricity by up to 46%, supporting the pump and injector system while the treated fuel is used.

Where it helps

Best fit: black or grey smoke, rough idle, poor throttle response, diesel hesitation and worsening economy caused by dirty injectors, poor spray patterns or EGR contamination.

Honest limit: heavy continuous smoke, a hard cylinder misfire, a fuel leak, low compression, failed turbo, blocked DPF or an electrical injector fault needs diagnosis rather than additive-only treatment.

Diesel injector fault symptoms

Look for rough idle, diesel knock, uneven power delivery, extra smoke, poor economy and DPF warnings arriving sooner than expected. These are the symptoms most consistent with poor atomisation and dirty combustion.

Why the DPF gets dragged into it

Dirty combustion creates more soot upstream. Even if the DPF is not the original problem, it can become the visible warning because it has to trap the extra soot. For an already-loaded DPF, pair this treatment with Forte DPF Cleaner & Regenerator.

Fuel pressure and injector codes

P0087, P0088 and P0201 Injector Faults on a Diesel

P0087 fuel rail pressure too low and P0088 fuel rail pressure too high mean the ECU is seeing fuel pressure outside its expected range. A dirty fuel system can contribute by upsetting injector delivery, rail control and the pressure regulator's working conditions, but these codes can also be caused by a restricted fuel filter, weak high-pressure pump, faulty rail pressure sensor, regulator fault or wiring issue.

P0201, P0202 and related P0201-P0204 injector circuit codes need extra caution. The word "circuit" usually means the ECU is unhappy with the electrical control side of an injector. A cleaner cannot repair an open circuit, short, broken loom or failed injector solenoid. Where the real problem is poor contribution from a contaminated nozzle, however, cleaning the fuel system can improve delivery and balance.

Use Forte Advanced Formula Diesel Treatment when the code appears with classic dirty-combustion symptoms: black smoke, rough running, hesitation, injector noise or worsening fuel economy. It is a maintenance treatment for contamination and deposit-related fuelling problems, not a substitute for live data, leak-off testing or electrical checks when a code returns.

  • P0087

    Fuel rail pressure too low

    Can be contamination-related, but also check filter restriction, pump health, pressure regulation, leaks and rail-pressure sensor data if it persists.

  • P0088

    Fuel rail pressure too high

    Treatment may help if sticky deposits are affecting delivery quality, but a regulator, sensor or control fault needs diagnosis.

  • P0201
    P0202

    Injector circuit / cylinder contribution

    Useful only where the injector is dirty or sticking. Electrical circuit faults, wiring breaks and dead injectors are outside the scope of a fuel additive.

EGR and airflow

P0401 EGR Flow Insufficient and EGR Valve Sticking Symptoms

P0401 means the ECU believes exhaust gas recirculation flow is insufficient. On a diesel, the EGR valve works in a dirty environment and can become restricted or sticky as soot and carbon build up. Common EGR valve sticking symptoms include rough idle, hesitation, smoke, reduced power, engine-management lights, limp mode and DPF regeneration that becomes harder to complete.

Forte Advanced Formula Diesel Treatment is relevant because the verified product facts include EGR valve cleanliness as part of the 10-component diesel system path. Cleaner injectors improve combustion quality, which reduces the soot feeding the EGR system. A cleaner EGR valve is also important during DPF regeneration because it needs to close correctly so exhaust temperatures can rise.

This is not the same as saying every P0401 can be fixed from the fuel tank. If the EGR valve is heavily jammed, the cooler is blocked, the actuator has failed, a vacuum/position sensor fault is present, or the inlet is heavily coked, mechanical diagnosis and cleaning may still be needed. The treatment is best used as regular service maintenance, or early when smoke, rough idle and hesitation point to deposit build-up rather than a failed component.

When the treatment fits

Early soot-related symptoms, light EGR sticking, smoke after short-trip use, injector-related rough running and vehicles that need cleaner combustion before DPF regeneration.

When to investigate further

Recurring P0401 after treatment, limp mode, live EGR position errors, severe inlet restriction, no boost, failed actuator movement or a DPF soot level already too high to regenerate normally.

Order Forte Diesel Treatment - £16 → Turbo sticking as well? See Forte Diesel Turbo Cleaner

Take A Look At Our 5 Star Reviews For Forte Seal Conditioner

At BMW Tool Rental, we pride ourselves on providing excellent customer service and offering honest and reliable advice to our customers. We understand that when it comes to your car, you want to ensure that you are using the right products and getting the right advice. That's why we take the time to listen to our customers, understand their concerns, and provide the best possible solution.

Our forte seal conditioner has received numerous 5-star reviews from our satisfied customers, who have found our product to be effective in reducing engine oil leaks and stopping blue smoke caused by worn valve seals. However, we don't just rely on product reviews to show our commitment to customer satisfaction. We offer a personal touch that sets us apart from other retailers.

If you have any questions about our products or services, we encourage you to reach out to us. We're always happy to help and provide you with the information you need to make the right decision. Whether you're looking to rent our AGA valve seal tool or purchase our forte seal conditioner, we're here to help.

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