15W-50 THAT's It...I've had it!!!!
Originally posted by Vader
Many NASCAR teams run 5W-30 or even 5W-20 (the new viscosity established under ILSAC for many new engines) in their engines turning 8000 RPM and making hundreds more horsepower than we can dream of in our LT-1s. Their reasons are less parasitic drag, better flow, more horsepower. And all of it based on the science of hydrodynamics, which accurately describes the process of lubrication in a bearing, which is far more complex than "pressure" or "thickness" arguments, which are far too simplistic.
So much for the thicker is better argument. If you had a clapped out British sportscar from the 60's, thicker is better. Not today.
I love anecdotal information presented as fact. It is so easy to disprove, and the logic so childlike.....
Many NASCAR teams run 5W-30 or even 5W-20 (the new viscosity established under ILSAC for many new engines) in their engines turning 8000 RPM and making hundreds more horsepower than we can dream of in our LT-1s. Their reasons are less parasitic drag, better flow, more horsepower. And all of it based on the science of hydrodynamics, which accurately describes the process of lubrication in a bearing, which is far more complex than "pressure" or "thickness" arguments, which are far too simplistic.
So much for the thicker is better argument. If you had a clapped out British sportscar from the 60's, thicker is better. Not today.
I love anecdotal information presented as fact. It is so easy to disprove, and the logic so childlike.....
But in an engine that spins 8000 rpm for hours at a time do you really want thick oil? Think how fast that oil is moving in the crankcase. If it was too thick, it would just move right on by the bearings causing the motor to burn up. Now lets come back to a everyday joe's car, that see's 5-7000 rpm for minutes at a time, thicker oil definatly will not hurt especially at lower rpms. Since we do not all have engines like in NASCAR, does the above statement hold truth? Would you want to run 5w-20 in a bottom end that costed your 3-5k to build? I wouldn't, but thats just me.
Come on guys, my brother's cousins sisters former roomate runs 9s on street tires and he uses 15w50, so it must be good. Plus, it says right on the bottle that its for RACING!
Nowhere in his post did i see ANYTHING suggesting that anyone should run 5w-20. 
Just run what the manufacturer/builder recommends!!!
-brent
P.S. listen to Patman
Originally posted by hsyr
Since we do not all have engines like in NASCAR, does the above statement hold truth? Would you want to run 5w-20 in a bottom end that costed your 3-5k to build? I wouldn't, but thats just me.
Since we do not all have engines like in NASCAR, does the above statement hold truth? Would you want to run 5w-20 in a bottom end that costed your 3-5k to build? I wouldn't, but thats just me.

Just run what the manufacturer/builder recommends!!!
-brent
P.S. listen to Patman
Both Ford and Honda now specify 5W-20 oil in their engines, and it is the only warranty approved viscosity. ILSAC and SAE have set standards for this oil, and you will find it being stocked now to service those engines.
But I agree, run what the manufacturer says. And GM says 5W-30. Good enough for me.
But I agree, run what the manufacturer says. And GM says 5W-30. Good enough for me.
I run 100% Extra Lite Virgin Olive Oil. It helps prevent build up of plaque which in turn can cause pre mature engine failure.
I got a good deal on it and the guy who sold it to me out of the trunck of his Lt1 assured me it was the only stuff he ever used. That's why he carried so many cases of the stuff around with him (just to make sure he had plenty on hand).
He also had some computers in there too, so I know this guy was really smart.
I got a good deal on it and the guy who sold it to me out of the trunck of his Lt1 assured me it was the only stuff he ever used. That's why he carried so many cases of the stuff around with him (just to make sure he had plenty on hand).
He also had some computers in there too, so I know this guy was really smart.
Originally posted by Vader
Both Ford and Honda now specify 5W-20 oil in their engines, and it is the only warranty approved viscosity. ILSAC and SAE have set standards for this oil, and you will find it being stocked now to service those engines.
But I agree, run what the manufacturer says. And GM says 5W-30. Good enough for me.
Both Ford and Honda now specify 5W-20 oil in their engines, and it is the only warranty approved viscosity. ILSAC and SAE have set standards for this oil, and you will find it being stocked now to service those engines.
But I agree, run what the manufacturer says. And GM says 5W-30. Good enough for me.
hole because you can use whatever equipment on your car you feel is necessary.
Heatmaker...
Feel free to run whatever oil you want and to believe whatever you want.
I tend to figure that when the owners manual calls for a particular weight oil, it's generally going to be a good idea to USE that oil.
But hey, I'm just crazy that way.
Feel free to run whatever oil you want and to believe whatever you want.
I tend to figure that when the owners manual calls for a particular weight oil, it's generally going to be a good idea to USE that oil.
But hey, I'm just crazy that way.
Guess you don't Sh*t about oil being used in nascar engine these day, now do you? They are using 0W oil, because it has less reciprocating mass. Which meants, MORE HP!!! So, 15W50 is the wrong oil for an engine designed for 5W30, Hummmmm?
As usual seems most of you missed the entire point of the post. Going off asking "where's your scientific data...oh t hat's your story...nasa uses this oil blah blah" as usual. The post doesn't say it's better than 5W-30...doesn't say it's the greatest oil in the world...Doesn't say to go drain your pan out right now. It's just some hands on experience with the 15W-50...an oil everyone seems to be confused on...but only a few have tried it. This post is about a guy that tried it and liked it and would like to tell others out there that it's not so bad. redicule me, make jokes...pointless comments ETC. Don't really care. Not here to defend mobile 1 or sell there product...just giving a review on a good hyperformance engine oil that provides good protection...what's so negative about that?
And for the guy who says they're using 5W-30 in racing...I would never talk about any component or product that they claim they used in racing and sell on the shelf. 9/10 what's in those cars is so custom it's hard to pinpoint the actual formulas. They're nothing like what you buy on the shelf. People spend hours in labs figuring out just what to put in those racing motors specifically. So it be hard to say that thier just using a 5W-30 formula.
It's interesting to see so many negative comments about someone giving a thumbs up and some hands on info on this site...as usual.
Not like I just swapped out the oil a week ago and just started using this stuff...it's been running in my motor for almost 2 years now....and where is all this NAscar? crap comming from? don't remmebr saying anything about nascar at all
.
What I do know is that they made 15W-50 for a reason. It's made specifiacally for high perfomrance engines. Personally I'd feel better knowing that my valve train and all had a little bit more than average protection.
I never said anything was wrong with 5W-30...but clearly 15W-50 provides more protection since it's thicker. What's to argue with that? If you don't like 15W-50 go write hatemail to Mobile-1. Don't flame the guy who's enoying the product.
And for the guy who says they're using 5W-30 in racing...I would never talk about any component or product that they claim they used in racing and sell on the shelf. 9/10 what's in those cars is so custom it's hard to pinpoint the actual formulas. They're nothing like what you buy on the shelf. People spend hours in labs figuring out just what to put in those racing motors specifically. So it be hard to say that thier just using a 5W-30 formula.
It's interesting to see so many negative comments about someone giving a thumbs up and some hands on info on this site...as usual.
Not like I just swapped out the oil a week ago and just started using this stuff...it's been running in my motor for almost 2 years now....and where is all this NAscar? crap comming from? don't remmebr saying anything about nascar at all
. What I do know is that they made 15W-50 for a reason. It's made specifiacally for high perfomrance engines. Personally I'd feel better knowing that my valve train and all had a little bit more than average protection.
I never said anything was wrong with 5W-30...but clearly 15W-50 provides more protection since it's thicker. What's to argue with that? If you don't like 15W-50 go write hatemail to Mobile-1. Don't flame the guy who's enoying the product.
Last edited by Heatmaker; Jan 29, 2004 at 09:31 PM.
I think you missed the point of all the replies. You claim to debunk "myths" in your original posts, but did not do so at all. If you like the oil, fine. Just don't go using erroneous information and making unsubstantiated claims to possibly coerce others into choosing an oil that may not be good for them.
I think you missed the point. The post is just to "debunk" the fears and wonders of "15W-50"...there's maybe a jillion post on here with people asking about it. And this is just about hands on info. Never said it was a bible to live by. Everysinlge person that read this post missed that and addlibbed only what they wanted to and put words in my mouth.I don't see where I forced people to are told them to go out and by 15W-50. I belive my last comment in the post was "Try it" meaning check it out sometime. For those looking for a little bit more. If you want data hit Mobile-1's research department up...but I as well as the others on this board who use this oil are satisfied for the moment. Erranious info how so? Every claim I state I can prove so how are there errors? My question is to those of you who are so quick to bash this oil...have you ever tried it? or do you just go by the stories that other people tell you? like anything...never knock it till you've tried it yourself.
END
END
Last edited by Heatmaker; Jan 29, 2004 at 09:40 PM.
I understand your point fully Heatmaker. You posted to debunk myths, which you erroneously assume we all believe in. Here's a thought - this board contains a great deal of expertise, shared at length constantly, from people who are very patient. Many people have helped me, and in return I have helped those that I can, and never a cross word has been exchanged. But your intentions border on condescension, assuming that we don't know very much, or have the wrong facts, or opinions, or experience.
Your last post confirms this. You believe you can prove things (Mobil has already done that to our satisfaction), that none of us have tried these various viscosities ( all of us have), and that we are somehow not grateful enough for your attempts to educate us.
Your first post was written to provoke, and you got responses in that vein. Toughies.
I also appreciate your attempt to stifle any further responses with the upper case "END". After all this talk, you don't think we are going away that easily do you?
Your last post confirms this. You believe you can prove things (Mobil has already done that to our satisfaction), that none of us have tried these various viscosities ( all of us have), and that we are somehow not grateful enough for your attempts to educate us.
Your first post was written to provoke, and you got responses in that vein. Toughies.
I also appreciate your attempt to stifle any further responses with the upper case "END". After all this talk, you don't think we are going away that easily do you?


