Thread: What should I use for oil in 40 Ford flathead?
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Old 06-29-2013, 11:38 PM   #15
mike42
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Default Re: What should I use for oil in 40 Ford flathead?
Valvoline racing oil 20w50 in my '40 Sedan 85hp. I change faithfully at 1500 miles. It has zinc in it. Sems to perform well.

Mike
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