Not asking what brand or dino/synth, just what weight? Seattle area so no sub-zero or even close these days. Thanks
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20w50 really boost your oil pressure and slow the leaks.
Ehh okay, 15w40
ya. I typically run 15-40. Works for my truck.I had heard that FullSynth was not advised for high mileage engines.....I have only owned it for a year so who know what it had before but it would be safe to bet not any brand of synthetic.
That's old advice, and basically no longer relevant with modern oils.