The TerraClean Process At Shrewsbury TerraClean

Diesel TerraClean Process

The Diesel TerraClean Process Explained

As part of the diesel TerraClean process, we disconnect your engine from your fuel tank, the machine is connected to the engine and it runs on the highly refined fuel inside of it.

This fuel is very rich in additives which perform the cleaning process, they clean both pre and post combustion removing gums varnishes and carbon deposits from the injectors, this restores the spray pattern and allows the fuel to atomise better.

Then once the fuel has burned the additives turn into gasses which oxygenate the carbon in combustion chambers, turbo, cat and DPF, this allows the carbon to burn at much lower temperatures and it exits the exhaust as carbon dioxide.

The end result of this TerraClean process is improved engine efficiency, this leads to improvements in performance, mpg and emissions

Petrol TerraClean Process

The Petrol TerraClean Process Explained

The petrol TerraClean process works by disconnecting the fuel supply to your engine and the machine becomes the fuel supply for the duration of the service.

The machine feeds the engine with two different fuel types. The first one (red can) is a pre combustion cleaner, this cleans inlet ports and valves and also fuel injectors of tars, gums and varnishes restoring injector response times and spray pattern allowing improved injection timing and atomisation.

The second one (black can) cleans post combustion by implementing the science of Columbic Fractionation, breaking down the molecular structure of the fuel and giving it a passive negative charge vaporising the carbon deposits in the combustion chambers, exhaust ports and catalytic converters and lambda sensors which improves the fuel burn creating less hydrocarbons and improves the accuracy of the air fuel mix.

This TerraClean process makes your engine more efficient which improves throttle response, performance, mpg and emissions.

Regain Performance

The removal of carbon deposits improves overall vehicle performance as well as improving the drivability of your vehicle

Restore MPG

When motoring journalist and TV presenter Quentin Willson reported a 14% improvement in MPG . people were eager to try TerraClean.

Reduce Emissions

The innovative service will remove most deposits from your engine and make sure that every cruising mile is as clean or greener then before

Preventative Maintenance

Every TerraClean service you perform on your car will remove carbon and gummid, which helps prevent problems from occurring in the future!

TerraClean Shrewsbury Reviews

Nicole Roberts
Nicole Roberts
Audi S5
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Had my s4 terracleaned and can definitely notice the difference. Great service and also was alot quicker than I expected it to take. Will definitely return again when its due another. many thanks
Gary Cooke
Gary Cooke
Audi Q7
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After the clean it’s been 550-700 miles of range. The best mpg l got on my trip to work was 24mpg and that was coasting A LOT. Doing the same drive now I got 30mpg
Mark Newham
Mark Newham
Ford Transit
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To be honest, I thought I would only see a small change in performance. I am however nicely surprised how much greater it in fact is. The car now has so much more grunt and is running so much smoother.
Maz Hussain
Mercedes E350
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Great customer service from reception to the technicians. I've had my E350 Terraclean and remapped the same time. The car feel's a lot more responsive and smoother throughout the automatic gear changes with plenty of torque to hand for overtaking. Great work and highly recommended.
Trevor West
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Had Terraclean service and remap done to my Golf TDI. The car is very much more responsive than before, but haven't done enough miles yet to work our the mpg. The service received was first class and would recommend them to anyone requiring similar work to their vehicle.
BMW X5 3.0D
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…I had to take this opportunity to say how impressed I am with the results. I have noticed an average increase of 6mpg on my normal 100 mile commute, the car is much more responsive and it smokes a little less on first start in the morning. It genuinely feels like it has had 60k knocked off the clock!
Mark Newnham
BMW X5 3.0D
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To be honest, I thought I would only see a small change in performance. I am however nicely surprised how much greater it in fact is. The car now has so much more grunt and is running so much smoother. The guys in the office were all very polite and professional to deal with. Many thanks Guys
Anthony Evans
Range Rover
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Excellent service and results from my remap and Terraclean on my Range Rover Vogue 4.4 V8. so much smoother, responsive and fuel efficient. Thanks ACE Shrewsbury 😁
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My Astra 1.9cdti recently failed Mot on emissions.After having the Terraclean service it flew through the Mot.I strongly advise folk to consider this service to pass the new tougher emission test. A big thanks to AceCarCare.
Gary O'neill
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Hi everyone 👋 definitely recommend ace terraclean to anyone who is thinking of a remap they do a good discount on the both together,and cleaned my car for me,it was like picking a new car up from showroom.
Andrew Smith
Vauxhall Insignia
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Just had my insignia terra cleaned,what can I say, amazing what a transformation, really recommend it and a great bunch of lads, really know there business thanks.

Need Help With TerraClean?

Got a question about the TerraClean process? Give one of our friendly & knowledgable technicians a call.

Why Choose TerraClean Shrewsbury?


Quick Process

The whole process is a ‘drive in – drive out’ service and usually takes around 1 hour for most vehicles. You usually need to pre-book to arrange to have the work carried out, but we may be able to squeeze you in on the same day.
Just call us on 01743 466100.



With the cost of the service for most vehicles being just over the hundred quid mark, we think it’s great value to keep your injection system, cylinder head, valves, piston crowns, catalytic converter, DPF filter and exhaust in great condition.



This isn’t a ‘here today – gone tomorrow’ service. It is a long standing and proven system which has been developing in North America over the past 6 years or more. There is plentiful data to prove the improvements we claim with regard to increases in BHP, better fuel economy and lower emissions.



We offer this service as part of our range of high quality products and services at Ace Car Care. We always aim to give great service at a great price, and will not compromise our standards just to save a few quid. So you can be sure you’ll get our best attention at all times.