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[i260]

I recon that most people, if they put 6-10 tanks of 99 through their car and then went back to regular 95 would then notice the difference. As I said, it is not a tap where you magically get additional performance, it somehow takes the car a while to re-adjust. The octane / cetane boosters have similar disclaimers.

[Gubz]

actually went up the motorway to belfast at the weekend there an noticed a smother responce an my fuel is lasting a bit longer then usual not very much though, especially at 118.9 round here  :-/

[TheBoy]

I have used Shell Optimax/VPower and BP Ultimate a few times, does seem to pick up slightly better, and if driven sensibly, return slightly better mpg, neither enough to warrant extra expense for me.

Also tried the BP 102 stuff, but again, cost makes it not worthwhile

[Gubz]

mine was just BP ultimited lol

[Jimbob]

Both our definately run better on it.

They maybe get 1 tank in 10 of it for cleaning purposes.

dunno if it helps or not, but not bothered for the couple of quid extra.

Normally stick to shell in both, neither like supermarket fuel
hers dislikes esso, mine is ok on it, both run very well on BP, but no convienient station

[mathewst]

Well I tried omv 100 fuel ( that's the name in my country) And actually at the first crossroad I thought the car turned off, cause it ran so smothly
Now I think I drive a Rols only the consumption does seem to be a little worse but that needs testing yet

[V6Rich]

I use high-octane fuel in all my cars.  From previous experience it has always seemed to make a vehicle run more smoothly and therefore more pleasant to drive, which to me is worth the extra cost.

I also have a few older vehicles that would have to have timing adjustments or octane booster to take the 95 RON.  One of them was tried on premium when it was new and wouldn't pull the skin of a rice pudding, so my opinion of the lower-octane stuff has never been very high.

Most of the time I use Total Excellium for convenience as there is a Total station just outside my village, otherwise I go for Shell or BP.  I did try Esso for a while but found the cars did not run quite as nicely as on the other brands.