Re: Ratio of Lead to Gas

Posted by Bob Kerr on July 01, 2003 at 22:20:19 from (152.163.253.102):

In Reply to: Ratio of Lead to Gas posted by Charlie on June 29, 2003 at 08:13:56:

Save your money. Unless you are running a high lift cam with a short duration and with dual or triple valve springs, ressession will just not happen. ressesion happens a lot on some of the old muscle car engines especially the ones that have valve rotators. The amount of lead added during WW2 was very little if any since a lot of the tetra ethyl lead went to aircraft fuels then. Lead was added mostly to prevent knocking in higher compression engines and most tractors are relativly low compression. However on the oil subject, and I am sure this will open a can of worms, but any engine using an oil filter should use a detergent oil. The detergent keeps the crud suspended so the filter can trap it instead of settling in the pan and passages. Since your H had non detergent oil in it, you can #1 keep using non detergent oil , but pull the oil pan off and clean it once in a while or #2 start using a detergent oil and change it and the filter more often the first few changes.

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