390 Oil for winter.
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390 Oil for winter.
I have a 390 with about 11,000 miles since rebuilt and have been running Val. 20w50 since I live in Fort Worth, Tx summers are pretty hot. This is the first winter its seen. Do you guys think it would be better to run 10w30 or run a synthetic blend 20w50 for winter. Would the blended oil cause oil leaks to form. Engine has no leaks currently just sepage around oil pan gasket. Thanks Guys?
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From: Colville, Washington
I have run 10W-40 oil in all my FE's year round in the Northwest. I live within 50 miles of the Canadian border and it was 0 degrees F this morning. It can get up to 100 in the summer, but not for very long. The synthetic blend would be good and it should cause no oil leak issues.
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From: Anola, Mb
Think about this, 85 percent of engine wear occurs at startup and at -20 deg F it take more than 3 minutes for the oil to reach yhe rockers with 10W30 oil. That ids why I stick with the 0W?? or 5W?? year round.
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I agree 20w-50 is good for a worn bearing engine, but with small clearances, use like a 10w30 or 10w40. I would not recommend going below a 5w-30 for where you live, because youll not see as cold of winters as Say the Northern US, I ran 10w-30 in my 390 and at 10 below, it started fine. Just dont overrev the engine until it warms up a tad, the shaft rockers dont need much oil anyways, so dont worry about that.
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From: Anola, Mb
Originally Posted by ford390gashog
as long as the oil pump is good it won't take more than a few seconds to get ooil up to the rockers
