Re: 15W40 in an old engine?

Posted by Rlach on September 25, 2005 at 17:42:12 from (69.159.147.143):

In Reply to: 15W40 in an old engine? posted by Rod in Smiths Falls, ON, on September 25, 2005 at 15:59:10:

From 1952 to 1975, we used 10W during fall, winter, spring, and 30 HD for summer, this was for a Ford 8N 1952;
For the last 30 years we have used good quality (John Deere, CIH, NH, CNH) 15W40 for tractors.
Below 50 °F, I recommend 10W30 or even 5W30 in winter (in Ontario);
Above 50 °F, I recommend 15W40;
NB : the engine has never been overhauled and is around 5500 hours.
IMHO, the problem is the rear oil seal, not the oil. Oil pressure seems low for a rebuilt engine but what about the gauge accuracy, @ ? rpm ?
Rlach

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• Re: 15W40 in an old engine? Rod in Smiths Falls, ON, 19:48:09 09/25/05 (0)

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