The Forte Range
Forte Additives & Lubricants
We always strive to deliver the best service we can, and what better way to do so than with Forte Additives and Lubricants.
There are loads of products available for all different scenarios that you will find below. We are able to deliver and apply all of these products to you during our working hours.
The options below are just a short guide, and when problems occur there are processes we carry out using multiple products. You can call us at any time for more insight and explanations of what products we recommend.


Advanced Formula Petrol Treatment
The perfect all in 1 treatment to accompany your routine service. The petrol treatment formula helps maintain the EGR and Oxygen Sensors, free up valves and pistons, reduce emissions and improve engine performance and driveability.
The treatment is fully compatible with all fuel system components, on all petrol makes and models.

Petrol Emission Reducer
This simple fuel additive is specifically designed for petrol vehicles that have failed their MOT emissions test, or showing emissions related fault codes. With rapid action, the petrol emission reducer removes injector deposits, cleans the combustion chamber, cleans the exhaust system including oxygen sensors and the catalytic converter.
The treatment is compatible with all petrol engines including direct injection and hybrid vehicles, for petrol fuels up to E20.

Petrol Specialist Injector Cleaner
This cleaner is specially designed to target and dissolve deposits formed in fuel systems, to help recover an efficient delivery of fuel to the combustion chambers. This cleaner will improve the combustion process, remove deposits from injectors, help to improve engine performance and driveability, and aid in stabilising the fuel system.
The treatment is compatible with indirect, direct and dual injection systems, catalytic converters, oxygen sensors and all petrol fuels up to E10.

Advanced Formula Diesel Treatment
The Diesel alternative for the all in 1, getting the most out of your diesel engine when partnered with your routine service. Specially formulated to combat driveability concerns caused by the by-products of combustion: helping to reduce black smoke emissions, restore injector spray pattern, improve engine response and performance, and to maintain the EGR and variable vane turbo systems.
This treatment is compatible with all Common Rail (CR) and Pumpe Duse (PD) and will not affect the ignition quality of your diesel.

Diesel Emission Reducer
The diesel alternative for failed MOTs on the emission testing. For rapid reduction of exhaust emissions, the treatment contains a special fuel-borne catalyst to improve combustion and clean the fuel, combustion and exhaust systems. When added to the fuel, it helps reduce exhaust smoke and emissions levels, removes injector deposits, cleans after and through the exhaust system, and helps to restore engine performance.
The treatment is compatible with all diesel engines including hybrid vehicles, for all diesel fuels up to B30.

Diesel Turbo Cleaner
Specifically designed for vehicles with Variable Geometry Turbos (VGT, otherwise known as Variable Vane Turbos), made to combat the most common faults with these turbo systems when incomplete combustion causes particles to adhere to the vanes causing them to stick. Highly recommended to be used alongside the Specialist Injector Cleaner treatment, it will actively reduce soot emissions, clean EGR valves and clean Variable Geometry Turbos without dismantling.
This treatment is compatile with all diesel engines, for all diesel and bio diesel fuels up to B30.

Air Conditioner Treatment (Lemon)
This treatment is a preventative and curative measure to effectively eliminate mould and other bacteria from the AC system to remove unpleasant odour that occurs. Over time, the evaporator in the AC system builds up and this simple in car spray can restore this system by destroying bacteria build up, deodorise the passenger cabin, and provide a healthier environment for occupants.
This treatment is applicable to all cars fitted with Air-Conditioning, and works well as a preventative and de-odourising solution.
The products above are just our top picks, we have more Forte products available.
When faults occur, most products must be used in conjunction with others and in a certain order, for certain amounts of time, or paired with a certain type of drive. When aiming to fix a problem, it is important that these steps are carries out properly and to manufacturers recommendations. We at GC Diagnostic Services are able to apply these products safely and effectively, and to all manufacturer specifications. We will never suggest Forte products if we do not believe that it is completely safe for your vehicle.
Don't hesitate to get in contact for more information on the full range of products, or for more information about the services we provide in conjunction with Forte products.
