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Old 05-18-2010, 08:15 AM
MADDOG MADDOG is offline
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87 would be the leanest and most fuel efficient tune.

However, if you are towing or going to be going over any steep grades, I'd go up to at least the 89 tune to avoid pre-detonation (pinging) and knocking.

I don't think you will see a huge difference between the tunes, mileage wise.

When you mentioned custom tuning it yourself, just what were you planning to do?
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