Jeffblue

don't cheap out on gas. its a 40k car. and like said above, its $5 per fill up. yes, gas in general is expensive, but premium gas isn't really that much more expensive than regular.

Assuming you put 12,000 a miles a year on the car, and assuming the car gets 20 miles a gallon, thats 600 gallons of fuel per year. Assuming a delta of 20 cents per gallon between regular and premium, that is $120 PER YEAR difference between using premium and regular. You and your wife can just like, eat taco bell instead of going out to dinner like once or twice and that pays for your gas.

its such a small difference if you think about it, which is why it always irks me when i see people putting 87 in their cars that reqiure premium fuel.

Technically the reason why you don't want to put regular instead of premium is because our engine runs high compression. Lower octane fuel will combust sooner and less consistently than high octane fuel. So the fuel will basically combust before its supposed to causing knocking and damaging the engine.