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i ran castrol gtx 20W50 and was seeing temps of 130ish and would climb to 215 on the highway reving at 4k.
this year running rotella T 15w40 and it's also at 130ish and has yet to hit 200 on the highway.
in about 500 miles or so, i will switch to amsoil synthetic 20W50 severe service racing oil.
i need to get more heat into my oil.
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'72 super
'65 bus
'52 split
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