Quote:
Originally Posted by oilers_fan
What about in vehicles in which the manual recommends premium fuel? My bike for example...am I wasting my money? The manual says 87 is OK, but 91 is recommended.
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That means put in 91 whenever you can. With most new cars, the OBC can accommodate 87 octane fuel by changing the timing if it needs to, but this should only really be done if 91 is not available when you're filling up, as it is a bit hard on the engine.