so putting cheap gass could mess upp yourr engine
Nah, it won't mess up your engine, man. 99% of cars are made to run on 87 octane.
You need to use premium if your car is made for it, if you have advanced timing, or your boosted.
93 does burn cleaner so its not a bad thing if you WANT to run it but you don't HAVE to run it.
Bottom line: you're fine
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