Originally Posted By: jamesintexas
I had a '78 Buick Regal for 23 years and used MMO in the gas religiously. After 23 years, it still had the intact original exhaust system and the engine burned very little oil! I think it was due to the continual slight oil vapor through the exhaust. I would think that after some 95 years of production, if it was snake oil someone would have found out by now! Seems like too many people are just overthinking it. If you like it, use it. If you don't like it, don't. It's really that simple.
I was actually afraid to comment about exhaust systems lasting longer while using MMO. I have two examples, but no science to back it up. My brother was replacing exhaust systems, via Speedy Muffler almost every two years, stop and go driving, trips averaging about 10 minutes. My son bought the Blazer I had speedy install a exhaust system and it lasted 4 years until we sold it, his trips were even shorter than when my brother had it. I had a similar experience with my 95 Caprice Classic. I think there might be some tiny oily film that might coat the exhaust system. Sorry no proof, but you back up what I thought and was afraid to post. LOL I'm pretty sure the same would be true with an UCL.