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2008 Forester

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Comments

  • paisanpaisan Posts: 21,181
    Well since the computer will be retarding the timing, it may not always be able to retard it enough, if you hit a tank of poor 87 octane. This will cause detonation (aka pinging) and this can damage your pistons, cylinders, heads, valves, etc.

    -mike
  • p0926p0926 Posts: 4,423
    So theoretically, if the computer is doing it's job retarding the timing, no damage should be caused. But then you've removed any margin for error.

    I too toyed with not using premium for a while but really how much would you save and is it worth risking damaging something? The extra 20 cents that premium costs is less than 10% of your fuel cost and becomes less and less as the price of gas goes up. And why have a turbo if you're not going to use its performance capability?

    So bottom line, like Mike says, you gotta pay to play. If $3 or so extra a tank is too painful, you should probably be driving something that doesn't require premium :)

    -Frank
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