Hell yeah I’d do both.
2004 6.0 NV4500 Tahoe
- Thread starter Dantheman1540
- Start date
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randeez
Full Access Member
there was a post on el es juan teq a few weeks back, may want to check it out, talks about the lucas about 3/4 of the way thru
it is the internet though so...so what you want
Which 15W40 for built LSX? - LS1TECH - Camaro and Firebird Forum Discussion
Generation IV Internal Engine - Which 15W40 for built LSX? - So my engine builder suggested I use 15W40 for my supercharged lsx 388 but said he prefer a non diesel type 15w40. Anyone know of any non diesel oil of this weight? All I found was Redline. Idk if I could use 15w50 which Amsoil...
ls1tech.com
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Dantheman1540
Full Access Member
But then that means dropping the pan
So I should drop to a thinner oil which is actually what I'd been considering since the Lucas is so thiccc. I plan to do a Blackstone sample in 2k when its oil change time and see what they say my viscosity is. Might drop to a 0w30.
I truly don't think I need a new oil pump or pickup tube O ring I think the oil is probably overly thick and the addition of the Cold Case oil cooler which is probably significantly bigger than the factory one just increased the resistance.
What oil do you run in that monster Randy?
randeez
Full Access Member
vr1 20w-50 lol but it runs like 70-95psi everythings a little looser than normal
ctsv i just run 5w30 mobil 1 syn/wix filter ...gm says run 0w-40 if you do "track days"
theres sposed to be a special type ESP developed for corvettes (lt4).. may give it a try next oil change
ctsv i just run 5w30 mobil 1 syn/wix filter ...gm says run 0w-40 if you do "track days"
theres sposed to be a special type ESP developed for corvettes (lt4).. may give it a try next oil change
pwtr02ss
Full Access Member
Buddy with the zl1 switched to that 0-40. So far, no issues
iamdub
Full Access Member
You don't say! lol
I might could've gotten away with .041" but I wussed out and went with .045". At that time, I didn't know Fel-Pro was an option. Dropped the coin on the Cometics. If I couldn't save the scratch, the least I could do is pass what I learned after the fact.
I used a dial indicator and magnetic mount from Hazard Frought. It's really not all that involved. There are plenty of YT vids. Basically, you get the piston flush with the deck, set the DI on it and zero it out then raise the piston to find the maximum. You measure from different points and with the piston rocked both ways, averaging the two figures. Keep a notebook handy. Don't be surprised if the four corner cylinders show shorter heights (less out the hole) than the four center ones. Determine your HG thickness based on the highest piston height.
I'd take the heads to a shop to measure the volume. It's kinda tedious and requires somewhat specialized equipment, so I'd let a shop do it. It shouldn't be much in labor charges- at least, not enough to bother homebrewed methods.
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iamdub
Full Access Member
Sorry. I haven't started mine in about a week. I try to minimize running it due to the stinch of being catless.
iamdub
Full Access Member
Unless it's frozen and the pump can't move it, your oil pressure should be higher when cold.
Straight 15W-40 was unnecessarily thick for my liking and I wanted more than 5W-40, so I mix it 50/50 for 10W-40 since that weight doesn't exist in Rotella T6. Blackstone said my last sample's viscosity was within the range of 10W-40.
You know you love your truck when you start mixing your own oil. 
