[Nezil]

Costco is way way cheaper than the 5c that Fuel Rewards gets you with V-Power, and that's before the 4% cashback on fuel you also get by using the Costco Credit Card.

I think if I was in another state, or country, I might use V-Power, but in California, where what's classed as Premium is 10% Ethanol 91 AKI, I don't think there is much difference between Costco and V-Power.

I gave Shell a try for a few weeks and didn't notice any difference to mpg or performance, so I'm switching back; first Costco fill-up was this morning.

P.S. When I lived in the UK, I used to drive an S2000 and always filled that with V-Power. At that time though, there was no Ethanol in the fuel, and if I remember correctly was 99 RON, which is roughly equivalent to 94 AKI. That was a good fuel!