changing oil today,what should i get? 61k ls1
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Joined: Jun 2001
Posts: 1,209
From: TX
M1 5w-30 is a good oil, as are many dino oils. But if I'm going to pay the $$$ for synth, I'm going to go with what my research on the boards indicates is the best for LS1s. And as of now, that's the GC IMO. Why did GM use M1 5w-30 as factory fill? Was it because they throughly tested many oils in their V8s, analyzed the UOAs, engine wear comparison tear downs, etc? Or...
As far as the 5w-40 M1 (or other 40 wieghts) in LS1s, some interesting quotes off ls1tech:
GM might be recommending Mobil 1 5w30 for use in the LT1 Corvettes, but it's more to do with marketing and the "factory fill contract" that Mobil 1 secured with GM, than anything else.
I should clarify that I'm not saying that you can't get long engine life with Mobil 1 5w30, just that you can get a longer engine life with other choices.
I should clarify that I'm not saying that you can't get long engine life with Mobil 1 5w30, just that you can get a longer engine life with other choices.
Their 5w40 Truck & SUV would be my first choice of their oils, followed by their 10w40 Extended Performance.
I'm not a big fan of Mobil 1 oils though, but I know there are a lot of people on here who will run nothing but Mobil 1, so I had to give them some sort of better choice than their super thin 5w30 (which is almost a 5w20)
I'm not a big fan of Mobil 1 oils though, but I know there are a lot of people on here who will run nothing but Mobil 1, so I had to give them some sort of better choice than their super thin 5w30 (which is almost a 5w20)
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Joined: Jul 1998
Posts: 6,247
From: Charlotte,MI USA
You are quoting one mans opinion. He is not God only a man. He's making statements that he can NOT back up with facts. Oil analysis does not take a motor apart and measure wear. GM does indeed test whether an oil will protect their engines. Any engine platform spends 1000s of hours on the dyno an millions of miles in real world testing. If Mobil 1 5w-30 was as bad as Pat makes it out to be then every test mule and dyno engine would have shown it on tear down. And so would mine after a 1000 passes down the 1/4 mile.
Registered User
Joined: Jun 2001
Posts: 1,209
From: TX
Nope, not God, just someone who knows a lot about oils. As far as oil analysis not being factual or a good indicator of engine wear... thousands of companies worldwide who use oil analysis as a key component of their predictive maintenance programs would disagree with you. And patman has never said M1 5w-30 was a bad oil, just that there are better choices out there. But as I said to the OP, he should do his own research and make his own decisions. That's a reasonable position to take, right?
Thread Starter
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Joined: Jan 2006
Posts: 62
From: Ft Lauderdale, Fl
Oh I forgot to update! I went with Mobil 1 and got a Mobil 1 oil filter to go with it and I also changed my fuel filter for the heck of it too. Car runs noticeably better...I am satisfied. Is it OK to wait like 5k miles before the next change?
Moderator
Joined: Jul 1998
Posts: 6,247
From: Charlotte,MI USA
Nope, not God, just someone who knows a lot about oils. As far as oil analysis not being factual or a good indicator of engine wear... thousands of companies worldwide who use oil analysis as a key component of their predictive maintenance programs would disagree with you. And patman has never said M1 5w-30 was a bad oil, just that there are better choices out there. But as I said to the OP, he should do his own research and make his own decisions. That's a reasonable position to take, right?
And don't get me wrong here I like Pat, he's a personal friend and we've had dinner together many times. He just shouldn't make statements like that without modifiers like ''in my opinion''.
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Joined: Jul 1998
Posts: 6,247
From: Charlotte,MI USA
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