My '76 C20 (2000 Vortec HD 350 w/AFR 190 Heads) now has about 5,000 miles on the engine. As it broke in I used Havoline 5W-30 and it was mechanically silent. At 3,500 miles switched to M1 5W-30 (same oil filters: PF35L) and since then I've been hearing some prominent ticking.
I've done some searches and found that there are plenty of experiences like mine, where M1 makes an engine mechanically louder.
There does not seem to be any consensus as to whether or not there is any positive correlation between the increased noise and increased wear.
So, my question is: if you are hearing more noise with M1, is there a corresponding increase in wear, or is it simply more annoying?
I guess I have a second question, too: if an oil is quieter, does that mean there's less wear?
Thanks, in advance, for all responses!
I've done some searches and found that there are plenty of experiences like mine, where M1 makes an engine mechanically louder.
There does not seem to be any consensus as to whether or not there is any positive correlation between the increased noise and increased wear.
So, my question is: if you are hearing more noise with M1, is there a corresponding increase in wear, or is it simply more annoying?
I guess I have a second question, too: if an oil is quieter, does that mean there's less wear?
Thanks, in advance, for all responses!