Thread: Fuel Question
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Old 06-03-2013, 03:27 PM
FrankSchwab FrankSchwab is offline
MC Devotee
Join Date: Aug 2004
Boat: 1998 Maristar 200VRS
Location: Phoenix, AZ
Posts: 1,685
In general, the higher octane fuel REQUIRES higher compression to work well - putting 93 into an engine designed for 87 is going to REDUCE performance, not enhance it.
If your engine is pinging or knocking, going to higher octane will probably help, and may increase mileage/performance due to getting rid of the ping/knock (and any timing retarding done by the ECU), but otherwise it's just money down the drain.
1998 Maristar 200VRS
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