Dont Buy Into It!!!
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From: Gainesville, Denton TX
I've run 0w30, 0w40, 5w30, 10w30 10w40 in my LSx stuff before.
the 0w30 was the german castrol, 0w40 was M1
10w30 etc was cheap dyno oil that i ran in my stroker motor.
the 0w30 was the german castrol, 0w40 was M1
10w30 etc was cheap dyno oil that i ran in my stroker motor.
Teching In
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I am really not sure why anyone would want to run a thicker weight oil unless they are running higher bearing clearances or they are turning out alot of horsepower and is a drag-only car. I don't think it is really neccessary for a typical stock bottom end h/c car. The thicker oil will give you thicker oil films which will reduce the metal-to-metal contact during boundary lubrication conditions, but it will also reduce the oil flow rate through the engine. At higher speeds the reduced oil flow will not carry away heat as effectively which means the bearing temperatures will be higher and it may or may not negate the advantage of higher viscosity. With thicker oil the pumping losses will be higher (i.e. less horsepower) and the lifters may not pump up as quickly which is what I thought his original problem was. As a bearing engineer for a GM supplier I find this topic very interesting...
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Originally Posted by 87GN&98VET
I am really not sure why anyone would want to run a thicker weight oil unless they are running higher bearing clearances or they are turning out alot of horsepower and is a drag-only car. I don't think it is really neccessary for a typical stock bottom end h/c car. The thicker oil will give you thicker oil films which will reduce the metal-to-metal contact during boundary lubrication conditions, but it will also reduce the oil flow rate through the engine. At higher speeds the reduced oil flow will not carry away heat as effectively which means the bearing temperatures will be higher and it may or may not negate the advantage of higher viscosity. With thicker oil the pumping losses will be higher (i.e. less horsepower) and the lifters may not pump up as quickly which is what I thought his original problem was. As a bearing engineer for a GM supplier I find this topic very interesting...
Apparently my dumb *** didnt know LS1's had RR's stock. My dad listened to it 5 seconds and said "those are your roller rockers...you know...your 5.0 does that only 2x as loud? sounds the same as when I heard it on the dealer lot" I felt like a 'tard
Yeah, it makes a tapping sound 1-2000rpm when I come off the gas or when I jig the gas. all 16 sound the same. Just RR's and I didnt know it had em' 
6600 rpm clutch dump of death Administrator
Joined: Dec 2001
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From: Texas
This thread makes me want to . But this is no different than many of the other threads where folks swear to something that when empirically checked shows absolutely no variance.
Don't get so hung up on viscosity numbers, like flow numbers, they are only a reference. Look at some of the posts by Patman, and some of the posts on BITOG if you want to understand the numbers behind the numbers.
As for me, I run 5W40 M1 Diesel Truck formula in my Z06. On anything with a flat tappet cam, or for inital break in these days I run Rotella. I'd run German Castrol, but I've had really good luck with M1 in a bunch of motors with a LOT of miles on them (320K on one) in fact.
Guys, the internet can be a great help if you read and research a bit. But, you also have to use the brain that God gave you first.
. But this is no different than many of the other threads where folks swear to something that when empirically checked shows absolutely no variance.Don't get so hung up on viscosity numbers, like flow numbers, they are only a reference. Look at some of the posts by Patman, and some of the posts on BITOG if you want to understand the numbers behind the numbers.
As for me, I run 5W40 M1 Diesel Truck formula in my Z06. On anything with a flat tappet cam, or for inital break in these days I run Rotella. I'd run German Castrol, but I've had really good luck with M1 in a bunch of motors with a LOT of miles on them (320K on one) in fact.
Guys, the internet can be a great help if you read and research a bit. But, you also have to use the brain that God gave you first.
Thread Starter
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Originally Posted by J-Rod
This thread makes me want to . But this is no different than many of the other threads where folks swear to something that when empirically checked shows absolutely no variance.
Don't get so hung up on viscosity numbers, like flow numbers, they are only a reference. Look at some of the posts by Patman, and some of the posts on BITOG if you want to understand the numbers behind the numbers.
As for me, I run 5W40 M1 Diesel Truck formula in my Z06. On anything with a flat tappet cam, or for inital break in these days I run Rotella. I'd run German Castrol, but I've had really good luck with M1 in a bunch of motors with a LOT of miles on them (320K on one) in fact.
Guys, the internet can be a great help if you read and research a bit. But, you also have to use the brain that God gave you first.
. But this is no different than many of the other threads where folks swear to something that when empirically checked shows absolutely no variance.Don't get so hung up on viscosity numbers, like flow numbers, they are only a reference. Look at some of the posts by Patman, and some of the posts on BITOG if you want to understand the numbers behind the numbers.
As for me, I run 5W40 M1 Diesel Truck formula in my Z06. On anything with a flat tappet cam, or for inital break in these days I run Rotella. I'd run German Castrol, but I've had really good luck with M1 in a bunch of motors with a LOT of miles on them (320K on one) in fact.
Guys, the internet can be a great help if you read and research a bit. But, you also have to use the brain that God gave you first.
Originally Posted by J-Rod
This thread makes me want to . But this is no different than many of the other threads where folks swear to something that when empirically checked shows absolutely no variance.
Don't get so hung up on viscosity numbers, like flow numbers, they are only a reference. Look at some of the posts by Patman, and some of the posts on BITOG if you want to understand the numbers behind the numbers.
As for me, I run 5W40 M1 Diesel Truck formula in my Z06. On anything with a flat tappet cam, or for inital break in these days I run Rotella. I'd run German Castrol, but I've had really good luck with M1 in a bunch of motors with a LOT of miles on them (320K on one) in fact.
Guys, the internet can be a great help if you read and research a bit. But, you also have to use the brain that God gave you first.
. But this is no different than many of the other threads where folks swear to something that when empirically checked shows absolutely no variance.Don't get so hung up on viscosity numbers, like flow numbers, they are only a reference. Look at some of the posts by Patman, and some of the posts on BITOG if you want to understand the numbers behind the numbers.
As for me, I run 5W40 M1 Diesel Truck formula in my Z06. On anything with a flat tappet cam, or for inital break in these days I run Rotella. I'd run German Castrol, but I've had really good luck with M1 in a bunch of motors with a LOT of miles on them (320K on one) in fact.
Guys, the internet can be a great help if you read and research a bit. But, you also have to use the brain that God gave you first.
As usual well said sir..
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Originally Posted by gun5l1ng3r
Are you guys sure the stock LS1s has roller rockers?
Or does the OP have RR on his car?
Or does the OP have RR on his car?
