Originally Posted By: Michael_P
Quote:
Remember folks the 5/20 is for MPG's, not really for durability.
It might only mean a difference of 1/2 MPG, but multiply that by millions of vehicles and we can reduce dependence. I will say a neighbor of mine blew up his engine on a Silverado with only 30,000 miles on it. He was pulling a 8500 pound trailer for about 3000 miles but the weather was in the mid 50's, so I doubt it was the oil. As a die hard Chevy fan he contends it was the oil. He was within the OCI
Odds are if it was a Chevy it called for 5W30 oil, which is probably what he was running. I'd bet it was a mechanical failure and as you mentioned most likely had nothing to do with the oil.
OP- The 5W20 5W30 debate has been beaten to death over and over. If the engine is doing fine on a 20 grade oil stick with it. If or when the engine starts using oil which may never happen, then try a 30 grade oil. Honda tested their engines as did Ford, and they are confident in using 20 grade oils IN APPLICATIONS THAT 20 GRADE OIL IS SPECIFIED FOR.