i do genuinly think you get better economy from super, so could be a false economy. I've not put 95 in my S, but experimented a few times with my old ITR and the super did give better economy, although the VTEC 'kick' was more noticeable with 95.

That said, i put some diesel v-power in the audi and got about 100 miles less from that tank, so chuck any old stuff in the oil burner.

(and yes the audi is a diesel).

 

It will run perfectly well unless it is highly modified (the engine, not stickers, stripes or spoilers).

 

Thanks Guys I will give it a go,

 

I get better milage on Vpower so it pays for itself.

 

It was noticable on the S2000, moreso if you have a blower and a decent ECU.

I found quickly I returned about 10% better economy on V-Power.
Its less than 10% dearer so its actually a better buy.

 

JDM cars appear to be the exception, quite a few report real knock as the ecu is unable to fully compensate.

My 56 plate runs fine on 95.

 

Mmmm.

I have a JDM and I am having the head skimmed so I'm pretty sure when it gets going I am really going to have to stick with high octane stuff.

I know one this though.

When I was in the Skoda it ran back to back dyno pulls with 14hp more on V power than 95 RON, no changes, same day, same temperature etc.
It also did 35 more miles per tank on quality fuel.

Around 11% more.


These high octane fuels need specific engine work or a turbo for you to really benefit.

 

Due to the thinner head gasket, therefore higher compression ratio...therefore more BHP

 

I have always used BP Ultimate because that's the only high octane fuel I can buy in the area. Filled to the brim with the stuff, I managed 330 miles on a trip down to Cornwall for New Years Eve. For the return journey I used normal 95 octane and only managed 300 miles which meant I had to re-fuel to get home. Maths not being a strong point of mine, I think that it's roughly equal ie more expensive fuel = more mpg vs slightly cheaper fuel = slightly less mpg

 

Normal cold weather driving .... no need for 97