Quote:
Originally Posted by dcdoug
Great way to do damage to a $5k-$10k+ engine to save $.15 a gallon.
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Yep. Some engines (like my Honda) use knock sensors and adjust. Most higher-performance engines (like both my Volvos, and several others in the past few years) REQUIRE 91 or higher for sustained operation without damage.
If I only had $0.15 for every old fart who told me I was wasting money putting premium in these cars, I'd have a free tank of juice.