Re: Synthetic Oil

Posted by Steven@AZ on February 04, 2007 at 17:51:16 from (24.121.155.253):

In Reply to: Synthetic Oil posted by Tractor Shed Billy on February 04, 2007 at 17:21:32:

I run Mobil Delvac 1 5w-40 in my '42 H that I overhauled and broke-in on IH low ash 30 weight.

No issues yet with 170 hours or so on the overhaul and once a year oil changes.

I believe you need to use something like Delvac that is rated for diesels that has (I think) extra zinc in it that a flat-tappet camshaft needs. Or maybe it's something else, anyway the new gasoline rated synthetics aren't real great in an old engine because lots of additives that flat-tappet cams need have been taken out because they take out the catalytic converter on newer vehicles. Check out bobistheoilguy.com for the specifics, I'm not real well versed on this.

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