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Oil viscocity 5W50
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03-10-2024, 02:53 PM
PontiacLars
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Join Date: Feb 2021
Posts: 102
I checked some oil charts and with my clerances, iron block and auto cross or street driving the recommendation was 20w50. Pure drag racing could use lighter as the oil did not get that hot.
My engine is a 4.5" stroker with roller camshaft.
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