Ask Honest John

Most recently answered v-power questions
As an alternative to Supermarket Diesel whilst attempting to keep fuels costs down, will I get some benefits from alternating Shell V Power with Shell FuelSave, should I stick with FuelSave as one fuel...
My son has recently bought a Audi R8 and I have told him to use Shell V power. He seems reluctant to use it on the grounds that the fuel consumption is already poor without adding the extra cost of premium...
I recently saw A Fifth Gear test on super fuels like Shell V Power. The conclusion was that benefits were minimal. Some forums also claim that any improvements are due to a placebo effect. You paid more...
Over the years I've used Miller's Diesel Plus in our diesel cars, mainly to lubricate the injector pump rather than seeking extra performance. We have just bought a Kia Cee'd 1.6 CRDi, and the handbook...
Is there much to choose between premium diesel fuels such as Shell V-Power, Total Excellium, BP Ultimate and Esso Supreme?
I have recently ordered a Volkswagen Up (your review was very informative) and was wondering what fuel (brand, RON etc) would you recommend? The model is a Take Up with the petrol 60PS engine.
Is there any benefit in using Shell V-Power diesel in my new Octavia 1.6 DSG or is it intended more for high performance cars? I only do about 6000 miles a year.
I have a clio 1.2Tce, in this type of engine (with turbo and compression ratio 9.8:1) can i get better mileage and performance using RON 98?
Is Shell V Power any use?
I am purchasing an Audi S4 2005 model - will the car run on standard unleaded or should/must I use super unleaded or V-Power? If I have an option will I get more mpg with the higher octane petrol? Are...