Is there really a difference in the quality of petrol?

A very good friend of mine who until recently was a team leader at Porsche told me that he never uses supermarket fuel. He said that he attended an event where they were told that the cheaper fuel was of a poorer quality and shouldn’t really be used if you want to keep an engine in tip top condition. Now, up until then, I thought that all fuel had to reach a British standard and was ok to use. I also felt that there was no real advandage in using the “Super Fuel” sold at so many places these days. After a while, my mate told me that the aforementioned event was run by MOBIL. He believes what he was told, me, I’m not so sure. Comments?

 I worked doing some training in a fuel depot in Gateshead (about 4 years age)

 

In came various tankers including supermarket, and filled up from the same tank in the Shell depot. I asked if the additives were different, and was told that the supermarket used to not put the additives in, but they do now!

That’s what I understood, too !

 

Tesco “momentum” is 99 ron and cost works out about the same as branded petrol in normal ron/octain. Dont know if its better in every day use but seems great when having a funny half hour bashing the redline.  

I’m convinced that rumours of supermarket petrol being rubbish is just propaganda from the big brands trying to spread fear, uncertaintly and doubt.

For about the first seven years I owned my car, I used almost exclusively supermarket unleaded.  Then I switched to Shell high octane in preparation for supercharging the car.  It made not a scrap of difference to my mpg.

By the way, Tesco Momentum is said to contain about 5% ethanol to increase its octane rating.

I have used Tesco regular petrol for years in all manner of cars from 1960’s Cooper S and MGB through various fast Fords and now in my current Fords and MX5.  Never experienced any problems. 

 I don’t think I have ever noticed any difference…but I think you will if you put diesel in by mistake Big Smile