Does it now make more sense to buy premium 99 ron fuel?

[rotaryjam]

With the recent increase in fuel prices I've been thinking, does it make more sense than ever to use 99 ron over the 95 ron fuel?

Even before the E10 fuel coming in, I heard that there was a small increase in MPG by choosing the 99 ron fuel with anecdotal reports suggesting 2-4% increase may be possible. Add in the switch to E10 and surely that MPG difference will have increased further.

Now add in the rising fuel costs and the gap between standard 95 ron and 99 rom is now proportionally lower? For example just now £1.72 standard, £1.79 for the
premium Tesco momentum. That's only a 4% increase, so you'd only need to increase your MPG by 4% to make it as cost effective, then you have the added benefit of more bhp.

Thoughts?

[Toltec]

The difference is 10p/litre here. You might break even, but you probably won't gain enough to make any difference.

P. S. my car uses super and it was quite handy that the pumps had that when normal unleaded ran out. Keep your hands off our super

[Spitfire2]

Definitely more cost effective for my E90 although I occasionally throw a tank of E10 in to prove it. 29mpg or less vs 36mpg or more on E5

[Mr Tidy]

I don't have much choice because BMW recommend using at least 98 RON "whenever possible" in both of my cars (one of them is an E90 BTW) so I usually use Tesco Momentum 99 RON.

It has been 7p a litre more than their Regular for as long as I can remember, but Shell charge another 15p for their V-Power. I think BP, Esso, etc. charge a similar premium for their higher octane petrol which is why I stick to Tesco.

That and the fact Tesco is my nearest filling station anyway!

[forsure]

Yes, my e46 330 was doing 20mpg on E10; tried E5 and it's now doing 25mpg.

[fttm]

Always use premium, V8 F150 , however I don’t commute or do enough miles to worry about the economy. Reason for using is fuel in N America isn’t refined to the best quality so I’d rather use decent rubbish against total rubbish .