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Old 06-25-2003, 08:07 AM
mbdoc mbdoc is offline
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
What car??
ON a 1988 190E 2.3 timing cannot be adjusted!

Higher octane fuel doesn't make for better running or more power unless the engine was designed for it!
The 1988 190E 2.3 has 9/1 compression & should run on 90-91 octane.
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