Thread: flathead oil
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Old 03-27-2012, 07:58 PM   #18
FLA48
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Join Date: Jul 2011
Location: Conroe TX
Posts: 170
Default Re: flathead oil

I do not know what "Junior Member" means, but I have been operating flatheads since 1953 and have always used 30 weight oil, until this last rebuild. Some of the engines had over 150,000 miles on non detergent oil before the heads were removed for a valve job. I am now using 10W 30. As a side note, I can remember the Houston Police department had a 53 Ford with 250,000 miles without even having had a valve job.
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