The injector in my Mazda 3 has failed - is this due to using supermarket fuel?

Whilst driving along, my 2012 Mazda 3 1.6d (39,000 miles) suddenly juddered and went into limp mode. I cautiously negotiated to the hard shoulder with the dashboard lit up with maintenance, ABS, and warning...

What fuel should I use to keep my 10 year old Toyota Avensis running?

You mention that supermarket petrol can clog up engines and reduce MPG from the deposits in their additives. I understand that it's best to use branded super unleaded. Is it the case that branded normal...

Would my hybrid car benefit from premium fuel?

I have a new Toyota C-HR Hybrid in which I'll do about 8000 miles per year, mixed driving. I also have a 2016 Toyota Aygo semi auto in which I do about 4000 miles per year, mostly short journeys. Would...

Is supermarket diesel as good as BP?

I run my Toyota Auris 1.6D on Sainsbury's diesel for two tanks and then two tanks of BP Ultimate. The car runs very well on both brands of fuel. I have been told that Sainsbury's fuel is supplied by BP...

Standard vs premium petrol - which is best?

I have followed your site for some time and have many a time heard the advantages of Premium diesel (or even branded diesel) over supermarket diesel. I myself have experienced the improvements. My question...

Is supermarket fuel inferior to petrol station fuel?

It was recently suggested to me that fuel obtained from supermarkets is inferior to that obtained from filling stations and service areas and is “diluted” in some way, resulting in lower performance and...

Why is our Renault Scenic averaging only 26mpg?

Our 2002 Renault Scenic 1.6 automatic has clocked exactly 45,000 miles. On a recent motorway journey of 150 miles I decided to check the economy and was horrified to find it was only 26mpg. We only use...

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,...

Is Shell monopolising fuel stations in certain areas?

I wonder if it's been noticed that Shell has recently bought virtually all the other petrol stations in the Camberley area. We had an Esso, a Texaco and I think two other brands. They are now all Shell....

I know you are not in favour of supermarket fuel, but...

I know you are not in favour of supermarket fuel, so I decided to check it out against my normal fuel which is Shell regular diesel. I drive a Nissan Pathfinder and for my test I drove from Cheshire...