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Same old story for the record.
Delvac 1 in my 95SET yielded better MPGs than M1 10W30. Delvac 1 also made the engine quieter and smoother. Note that this engine had higher miles and the running clearances would not be as-new.
My next change will be to Delvac 1. I don't expect that I will notice any difference over M1 0W40 that I have been using.
posted by 65.68.10...
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