synergyn or delvac 1

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Oct 4, 2003
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IMO its apples and oranges. Synergyn doesnt come in 5w40, or a 40 weight at all. Synergyn is mainly a gas racing oil, but can be used in diesel, D1 is a diesel that can be used in gas. Personally, Id take the synergyn.
 
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Apr 18, 2004
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Boynton Beach FL.
I have 5 gallons of SYNERGYN 3/30 and wondered when you said its a racing oil do you mean like M1R. I was hoping to use it for hopefully 5000 mi during the winter. [Confused]
 
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