Are you still using regular grade fuel?
It may not be you, but somebody somewhere with a name similar said something about your use of 87 octane on a road trip without any problems and your continued use of regular grade fuel.

Just saying, maybe the use of regular fuel over an extended period of time does have it's side effects. Food for thought is all. Would be interesting to see if that were the case.

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Allen Kroliczek
Oak Grove Autosport | Oak Grove Autosport
01 G500, 82 300TD, quite a few more.....