97 RON = better MPG??!?

**Jamie** · 1st July 2005, 20:11

I've started putting 97 RON fuel in the car as its only an extra 2p a litre from Tesco... Seem to get about 10-15% more mileage out of a tank full... anyone else noticed this or is it a figment of my imagination!!?!

**Duncan** · 1st July 2005, 21:40

Nope, not a figment of your imagination.It can make quite a difference. Higher octane therefore burning more efficiently.

Is that Tesco 97 RON a recent thing? I only ask as since my remap I've been using SUL (as it's recommended by the remappers) and I had to stop going to my local supermarket petrol stations as they didn't do SUL - so I've been using Esso SUL which I'm sure is a good bit dearer than the Tesco one!

D

**cpt slow** · 1st July 2005, 22:38

Same here , I thought it was me believing silly things . But looking at the mileage , yes im gettting mor MPG using SUL

**cyb** · 2nd July 2005, 09:16

Didn't know tesco did 97?
I haven't noticed it at my local branch, I'll have to keep a look out for it.

**Bainie** · 2nd July 2005, 11:57

My boss used to drive from aberdeen to manchester weekly and used Shell, he would fuel up on the way out of aberdeen and stop on the way into manchester at the same pump. One week he stopped at sainsbury`s and filled up, had to stop again way before manchester to fill up again as he had used the tank full ! I could not beleive it, I though petrol was petrol... I have never benn to a supermarket for fuel since. Oh yeah he drove a toyota people carrier thing so did use a whole tank from Aberdeen to Manchester !!

**Jamie** · 2nd July 2005, 18:39

Both the Tesco stores near me have 97 RON.... when they got rid of LRP they replaced it with Super..... Its a bit cheaper that BP Ultimate and Shell Optimax (which I think are both 98 RON) and the extra 2p a litre seems to be paying dividends!!!!!!

**acame2000** · 21st October 2007, 07:43

personally i don't know if i get better fuel efficiency out of the higher octane or not (don't use anything less then the best i can buy from shell

optimax is the stuff i touch) it is a cleaner more refined fuel so i do see the theory in it but i drive hard so it doesn't realy make much difference to my efficiency just more

and also because it is a better fuel it looks after the engine more