Quote:
Originally Posted by 10/10ths
Of course, that brings the cost up to just buying premium fuel.
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The OP doesn't mention WHY they want to use regular instread of premium. I assume it's because of the price difference.
For arguements sake, let's say premium is $1 / gallon more expensive than regular. A fill-up will cost you a whole $15 more for premium. If you're scraping to save $15 once or twice a mo, a Boxster may not be the proper vehicle for you.