Originally Posted By: Wurlitzer
This concerns me. What if a car that calls for 5w20 would actually get better protection and have a longer life running 10w40?
So if the engine in the car which calls for 5W-20 runs for 300,000 miles with no oil consumption and/or leaking issues on 5W-20, and say 350,000 miles when running on 10W-40 (I'd argue highly unlikely), but the rest of the car is toast after 250,000 miles, why the heck would you care?
This concerns me. What if a car that calls for 5w20 would actually get better protection and have a longer life running 10w40?
So if the engine in the car which calls for 5W-20 runs for 300,000 miles with no oil consumption and/or leaking issues on 5W-20, and say 350,000 miles when running on 10W-40 (I'd argue highly unlikely), but the rest of the car is toast after 250,000 miles, why the heck would you care?
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