Should I be cooling the turbo on our Mondeo and should I use a premium fuel?

We have a 2011 Ford Mondeo Estate Titanium X 2.0 litre petrol model. We cannot find details of the optimum revs for each gear. Is this model turbo boosted and if so does your advice re leaving engine to...

What is causing my Mercedes-Benz E320 diesel to smoke under acceleration?

I have a 2002 Mercedes E320 diesel automatic estate. It has done 115,000 miles and I now use mainly Shell V-Power or other brand fuel, but I have been guilty of using supermarket diesel in the past. When...

What could be causing my daughter's Ford Ka to over-rev when idling?

My daughter has a 2004 Ford Ka. It has developed an intermittent fault whereby it will often over-rev when idling or rev in "pulses", as if someone is fanning the throttle. It has now also started running...

Premium fuel solved a stalling problem on our i30.

I own a 2009 Hyundai i30 petrol 1.6 Estate (manual) bought from a Hyundai dealership in 2010. This car has been a likeable, reliable car to drive over the last 20,000 miles. However, more recently my wife...

What fuel for my C-Class?

The handbook in my Mercedes-Benz C-Class advises to use premium type unleaded petrol. However two other owners with similar cars say they use standard petrol. What should I use?

Which premium diesel fuels are the best for which types of driving?

I have been reading with interest your advice on diesels having just taken delivery of my new company car a Mercedes-Benz E350 CDI. Like all diesels, it gets really upset if all I do is drive 1.5 miles...

Shell V-Power

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...

Can I run my 1991 Scirocco on super unleaded and fuel additives?

I have a 1991 Volkswagen Scirocco GTll. At present I am filling my tank with Sainsbury's Super Unleaded and adding a Millers VSPe Power Plus fuel additive. I believe my car was converted before I bought...

Who’s fuelling who?

I always find V-Power fuel to be really good on engine of all the fuels that I have used over the years. Does this mean using supermarket fuels result in less mpg due to higher RPM, more carbon deposits,...

Do I need to use 98RON in my performance car?

I have a Mazda3 MPS 2009 and the fuel flap says use MIN 98RON but my supplying dealer - SG Petch - said 95 is fine. Forums suggest you'll lose some mpg & power with 95 but I am not too fussed about this,...