TEL (tetra-ethyl lead) was first commercially used in gasoline in 1924. Any dual-fuel tractor does NOT need, and did NOT need lead. Kerosene never had it. in fact, I would go as far to say that the gasoline only tractors up through the 1950's (early) will run just fine on regular or mid-grade (87 or 89).
When your compression ratio starts getting around 7:1 or greater, then higher octane is an absolute requirement. BUT, it still does not have to be TEL. Your SC should be around 5.5:1 or there abouts. Regular gas will work just fine.
As far as the oil goes, clean oil, and regular oil changes as required is all you need.
any of the F-series or Letter series tractors are low compression, low RPM's. Clean oil and clean fuel is what they crave.
This post was edited by Tom Fleming at 13:22:11 09/05/10.
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Today's Featured Article - George's Fordson Major - by Anthony West (UK). This is a bit of a technical info to add on to the article about George's Major in the "A Towny Goes Plowing" article. George bought his Major from a an implement sale about 18 years ago for £200.00. There is no known history regarding its origins or what service it had done, but the following work was undertaken by Harold alone to bring it up to show standard. From the engine number, it was found that the major was produced late 19
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