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Originally Posted By: Garak Originally Posted By: lawnsbymike From Penzoil: "Pennzoil does not recommend extending oil drain intervals beyond the "severe service" maintenance interval of three months or 3,000 miles." Penzoil was born before the Great Depression and is still in business...

Originally Posted By: used_0il Which oil companies "sell" oil change intervals, as opposed to following the manufacture's recommendations? For example if I switch from regular Pennzoil to the new and improved Pure Plus, apply popular opinion, I should extend the OCI. However if I change the...

Originally Posted By: tig1 lawnsbymike, I disagree with most everything you said. I will stick with what's worked for me for 36 years. 10K OCIs, clean engines, engines that have never shown any sign of pre-mature wear. OH! Welcome to BITOG. No issues with you disagreeing, like I said if it...

Business is busy this week and I haven't had time to stop by. Chevy, I appreciate all your input, and don't think I take it with a grain or salt, I get your just trying to state your opinion. Just like I state mine. I'll be around here in my free time, as you said there's many knowledgeable...

Originally Posted By: used_0il Lawnsbymike mentioned the 5.7 Chev being labeled as "high wearing", but facts prove otherwise. When old design V8 engines were converted to LPG, they lasted forever. Gone were the gasoline carburetors, cold start cylinder washing and fuel in the engine oil. I...

Originally Posted By: crazyoildude doing your oil changes at 3000 miles is a waste and could be doing more harm than good Many people would believe that and the government probably has 80% of the population believing that. As far as doing more harm then good, I don't consider it harm, again...

Anther thing if you read these articles; this is one thing that caught my attention "these engines do not exhibit impressive wear performance". This phrase is speaking for the 5.7 GMC engine, according to the study, this engine had higher wear numbers then the majority of all the engines tested...

I was just about to say something very similar, I said it once, and I'll say it again, I have nothing against guys changing their oil every 10k miles, 15k, 25k, or however they handle it. I don't care what test or paper says this and that, I don't in my mind physically believe and won't believe...

Quick Question for you.... What is physically wrong to the engine to change the oil at 3k miles with synthetic? Would you be happier and healthier if you had clean constantly flushing your system or if you were drinking dirty oil. I sleep at night with 3k mile oil changes. Every single oil...

I looked in all the oil sections and couldn't find an appropriate section being that all the Oil sections are divided, so I hope this is a good place for this question being that everyone in this forum is under this topic for something "auto related." Anyway, I've read much about Wally World...

No, still plenty of life in it, but like mentioned above, the key factor is; HOW WELL IT WAS MAINTAINED. 300,000 hard miles on my Z-71, original motor, 2nd tranny, need I note this is a landscape truck and has pulled a 20 foot trailer loaded with several zero turns weighing at 1,300 lbs each...

This was the Oil Life Monitor. As for the OCI from GM, I have no actual idea what the trucks OCI indicator is set to, I'd have to dig the manual out to check the specs of what they actually call for, I've always been 3k from day one. Like I said it's not a money issue, we buy the Mobile 1 in...

So the thinner oil at operating temperature and less parasitic loss would explain why my oil pressure psi dropped by 10 psi? I always felt it was a bit high, now it seems to be just about right. As far as the oil changes? The 3,000 mile oil changes is something I'll never change. I guess I'm...

I've been using Valvoline Max Life in my 2002 Chevrolet 5.3 Vortec engine since buying it from the previous owner. I bought it around 75,000 miles and that's all he ran in it. I'm not over 300,000 miles on the odometer, original engine by the way, 2nd transmission. The tranny went 3k miles ago...