Esso have changed their premium fuel ("Supreme")

21 posts / 0 new
Last post
Last seen: 16 hours 45 min ago
Joined: 17/04/2014

Only car I've ever noticed a difference in is my 1100cc 1991 Pug 106

On 95 octane, foot to the floor it will wind up to terminal velocity down the bypass on the morning commute . . .

Filled up one week at the local station - they'd accidently filled the tanks with "super" but were still selling it at 95 octane prices . . .

Foot to the floor terminal velocity was a good few mph faster each morning that week . . .

Last seen: 9 hours 8 min ago
Joined: 14/09/2020

My F80 M3 is definitely a bit perkier on 98 ron fuel (the best that is locally available). Mid revs pickup is better as well as full throttle response.

But it's no slouch on 95 ron either. :) 

Tim S
Tim S's picture
Last seen: 1 day 20 hours ago
Joined: 19/07/2015

Don't let it go to your head Derek!


Last seen: 7 hours 23 min ago
Joined: 17/04/2014

My modern Golf seems to get a few more MPG on 98/99 vs 95.  Cant really tell any difference in the engine behavior.  I always run the 7 on 98/99 as it has less bioethanol in it.  The limited miles I do I can put up with the extra cost!  

StevehS3's picture
Last seen: 3 hours 47 min ago
Joined: 17/04/2014

I have tried the higher octane fuels in my 1600 K and as expected there is no noticeable difference. I have wondered if it could be justified by the supposedly better additives but I generally don't do short journeys in the 7 so don't bother. 

Nick Bassett
Nick Bassett's picture
Last seen: 1 min 59 sec ago
Joined: 17/04/2014

Back in the 1950s my Dad's cousin was stationed at RAF St Eval in Cornwall where they had ASR Lancasters... he used to run his Austin 7 on aviation 100 octane which i am told had sparks flying from the exhaust! Probably didn't do the valves much good either...

Probably not much help to the OP (sorry), but I thought some would find it amusing!

Bolter, bolter, full power...
OldAndrewE's picture
Last seen: 6 hours 8 min ago
Joined: 29/04/2020

In the 1970s when 5 star petrol was still available it was 101 0ctane I seem to recall.  I used to run my modified Austin 1300GT on this.  It would pink on lesser fuels when driven hard.

I also seem to recall seeing a review of premium fuels a few years ago.  Although they all had the correct octane rating some were better than others with regard to calorific value.  The one that came top was Shell Optimax (now V-Power) 


1985 S3 1700 XFlow.  Undergoing full restoration

Golf Juliet Tango
Last seen: 7 hours 13 min ago
Joined: 17/04/2014
Roger, I hear what you are saying, it is just something I feel from the car, noticable when trundling around towns and villages. If I am caning it through the country lanes, no, it isn't noticable but at 2k to 3.5k there is a different feel, small but present.


Democratic dissent is not disloyalty, it is a positive civic duty

Ivaan's picture
Last seen: 5 hours 44 min ago
Joined: 17/04/2014

It makes a big difference to the R1 at higher elevations. In the mountains in Spain, unless filled with high octane, the engine struggles at low rpm. It's on carbs and I guess with injection engines the ECU compensates for air density.

BECs Rule !
Roger King
Roger King's picture
Last seen: 5 hours 25 min ago
Joined: 17/04/2014

GJT, that might actually be an indication that your carbs need setting up. I don't know the spec of your engine, but the standard Supersprint jetting often leads to stumbling at low revs and throttle. I can't be certain of course, but if it's not spot on a different brand of fuel might just be enough to highlight this.