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Discussion Starter · #1 ·
I'm using Valvoline 10-40W on my 65 6 cyl, here en El Paso Texas (now we're at 100F and tomorrow and all the summer) Is better the syn than my actual oil? Or any other grade?
What should I do? the engine feels pretty good.
But I'm always open to new ideas or ways to improve my drvive
Thanks!
 
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