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28/07/2024 8:20 am
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What brand/kind of octane should I use for a 21 gallon tank of regular unleaded gas?
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28/07/2024 8:30 am
None. Just buy the grade of gasoline that your engine requires. (You failed to mention anything about what kind of vehicle you're dealing with.)
@chucktobias Notes, I see your screenshot of how to submit a question properly. Thanks for your reply.