Quote:
Originally Posted by Transport3r
If you really want to find out, do a UOA with 0W30 and another one with 0W20. I did and the 0W30 had significantly less aluminum and iron wear. I’m in a hot climate so YMMV.
Edit: 0W30 instead of 5W30 allows you to have the same cold start protection as 0W20.
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Besides an engine tear down that is the best way to see what’s going on inside, but you’d need to have a good test with a good control to validate the results.
What was vehicle mileage at start of each test?
Miles driven per change? Months between change as well?
Avg ambient temp as well as oil temp when driving?
Avg MPG during each test, Mostly to use as an indicator of possible driving style changes
Driving style/condition?
Have you switched back and forth a few times to get repeated results?
Would be interesting to run 0w-20, then 0w-30, then 0w-30 again then back to 0w-20 to try to get 1 “test” per weather season, assuming you do 1 change every 6 months and drive identical mileage per.