Quote:
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Originally Posted by Andrew
If I don't use premium, the engine monitor will retard spark timing since it can't burn the fuel as efficiently, thus reducing horsepower and mileage. It also leads to dirty injectors. [not a car guy] Or something like that. [/not a car guy]
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I would have to respectfully disagree that premium would lead to cleaner fuel injectors, I think that depends more on the additives they put in rather than the premium/regular choice, so that could be brand dependent.
I didn't realize reducing the horsepower might reduce the mileage. I googled around and found an interesting
article:
"High-test does have a potential fuel economy benefit. It is slightly denser than lower-octane gas, meaning there's a little more energy in a gallon. But the small difference is hard to measure in real-world use, and that same density can contribute to undesirable buildup of waste products inside the engine. "
I learn something new everyday