Thorney Motorsport has been in the business of tuning cars for over 20 years and its fair to say we have seen our share of 'snake oil' products to emerge promising all kinds of performance gains. Oil additives, spurious petrol claims, engine flush treatments, pretty much all of them are there to expand the pocket of the garage rather than improve your car.
So when we are contacted by a company offering a process to clean your engine, gain power, improve fuel economy with no downsides and a cheap cost you can imagine our response......the second word was 'off'. However they persevered and the fact the guy selling it to us was previously employed by me for 5 years whom I respected I did begrudgingly agree to a demonstration.
So, we provided two cars to run the test on, our Mclaren 12c Spider, a £130,000 car which is already heavily modified but with low miles (20,000) so not exactly worn out and also our Citroen C2 race car, 118,000 mile shed which we are racing this year purely for fun. The reason we picked the Citroen is that the race regulations are very tight and we cant touch the engine all we can do in the regulations is clean it, so we figured thats what we'd do.
For the purposes of the test we dyno'd both cars and then ran the HydroFlow machine on each and then dyno'd the cars again, same day, same conditions.