I appreciate you're talking about the US, but in EU (UK more specifically) premium fuel usually means Shell V-Power Or BP Ultimate which is the performance stuff 97/98 Octane).
You can get 87, but most go for Normal = 90 due to the price. Performance is much more expensive, 8p a litre (about $10/tank).
The point I am making is whilst I agree to an extent that if you are buying a luxury car, this would be insignificant, however as a company car when you pay fuel and tax on the benefit (UK Tax stings you!), then that's why I don't put performance fuel in.
Moreover, I give the car back every 4 years so don't care... and recent studies (Top Gear, What Car, AA etc. show no tangible difference in performance).
Each to their own
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Last edited by jedpause; 01-10-2013 at 09:55 AM.
Reason: Additional point made