Why do we pay more for premium fuel?

[vztrt]

Originally Posted by AussieAV

Yeah, that answers it, thanks.

Not really worried about how much if any extra performance, as its a road only car, but was just wondering if it was capable of sensing better fuel and adjusting to run better and get some benefit.

To be honest, using 98 (BP Ultimate) more out of blind faith that it may help engine longevity. Theres a chance my son will get the XR50 a few years down the track, and want to keep it in as good a condition as I can.

If your not worried about performance then the 91ron will be perfectly fine. ATM am looking to see if the 98 is worth the extra premium over 91, but the FG on 91 can pull good (fuel economy) numbers and about 60-80km a tank more then 95ron E10 (which is funny cause the B-series made no difference from my experience).

[JimNiki]

when I first got my 06 outlander, it documented the kilometers I got using the different octane ratings ... (no E10 in those days)

The extra I paid was not worth it ...stuck to plain Jane 91 ron ever since.
The mustang (351 clevo) has only ever seen 98-100 ron...

[Rodp]

In my Clubsport, I've thrown in a few tanks of E10 in without any problems (including today) without any noticeable difference in performance. I can't speak about economy as my driving is random trips at random times so would have to use E10 for an extended period and check the trend.

Just signed on a Ghia today and I may occasionally stick a tank of 95 or 98 into it but it'll be running predominantly on E10.

[mik]

i guess it depends on the car, my xr6 ran ok on the ethanol most of the time, but it ran a bit rough on it when cold , definatly got less k`s out of a tank.