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Originally posted by LxAccord97 the how come all honda manual says use 87 or higher ?
87 is the minimum octane level required for the engine.
**IMPORTANT**
You only need to meet the minimum octane requirements for the engine. Putting in fuel with an octane rating that is HIGHER than the minimum is NOT going to help you. It will only hurt you unless you manually advance the ignition timing of your engine to compensate for the different characteristics of the higher octane fuel.