Some good comments above. Every forum I have been in has eventually asked this question.
I worked in the oil industry for the last 25 years of my career and whilst my speciality was lubricants I ate lunch on many occasions with the fuel chemists. I worked in a research lab and saw the test results.
There are many who swear there is nothing wrong with supermarket fuels and many use them without any issues whatsoever but if you think all fuels are the same then let me put this in a completely non technical way....
Ask yourself the following 3 questions with a simple yes/no answer
1) do you accept that the major oil companies spend many millions of dollars and cover hundreds of thousands of miles developing and testing their fuels?.......yes/no
2) do you think the supermarkets do any of the above ?......yes/no
3) do you now think that the oil companies will sell their proprietary technology to the supermarkets so that they can undercut them at the pump?...... yes/no
Now, assuming you answered ....yes/no/no...then "go figure" as they say across the pond.
Do I ever fill any of my cars with supermarket fuels knowing what I do? Well, yes, but very, very rarely.
Our Captur received its second tank of fuel today, both so far from BP. I don't recommend BP over any others, I more usually fill up with Esso because they have far more fuel stations in this area. I basically stick to branded fuels.
At the end if the day you pays your money and you makes your choice Edited by: Perusal