Quote:
Originally Posted by kenchan
at least premium isn't expensive as it was a couple of years ago when it took like $80 to fill up...
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It's a whopping $0.20-0.30 a gallon more, for around 10whp or so (according to Ford, the mustang GT gets 412bhp on 91* and on 87* it gets 10bhp less, and 13#tq less). If you get 20mpg and drive 15K miles a year, that is about $200 a year for 10hp/13tq mod. A VERY! cost-effective mod in my book! You would have to put 25K miles or so on the vehicle to equal a cat-back in price, and this involves NO work and NO chance of voiding a warranty.