View Full Version : smoking LS1 - does oil weight make a difference?


Renč Hansen
09-13-2005, 03:37 PM
What Is Wrong With My Engine. It Realy Smokes When I Give Full Trottle, It Has Ran 36000,and uses about 1 quater oil in 1000mile. There is no Mod made other than Borla exhaust and headers. and the oil is 5w30. somone told me to use 10w40 insted, is it going to solve the PROBLEM

99hawk409
09-15-2005, 12:24 AM
headers can make your car run rich which will cause some smoke i believe.
(you'll want to get it tuned)
Also...the pcv systems in the LS1 allow for alot of oil to get "inhaled" back through the intake thus burning off some of the oil sucked out of the valve cover.

jimmyblue
09-15-2005, 08:08 AM
There are two main problems.

One is the factory tune, which is rich to begin with
and often made worse by mods that bugger the
fuel trimming, adding to WOT enrichment.

Two is the PCV uptake of oil, coating the inside of
the intake and the oil hoovered back out at high
intake airflows.

Black smoke or gray smoke, tells you which. Of
course you might be in a grayish black sort of
condition too....

Prophecy
09-21-2005, 11:11 PM
my car burns 1 quart every 1,000 miles.... I work for Valvoline so it isnt a problem... DO NOT PUT THICKER oil in the car.... It will wear the oil pump...

JEB99TA
09-22-2005, 04:20 AM
Mine does the same thing ... at WOT it smokes and burns about a quart of oil every 300-400 miles when I run it consistently hard. A quart every 1000 miles if I drive it real easy. I've done tuning, different oil weights ... replaced PCV. You name it, I've done it. I think mine is the valve seats or the rings, so, I'm getting it forged with a new H/C package ... tired of the smoke everytime I streetrace somebody. I seem to always win, but, I leave them in a cloud of smoke and it's embarrassing as shit.

transam1998
09-22-2005, 11:58 AM
What Is Wrong With My Engine. It Realy Smokes When I Give Full Trottle, It Has Ran 36000,and uses about 1 quater oil in 1000mile. There is no Mod made other than Borla exhaust and headers. and the oil is 5w30. somone told me to use 10w40 insted, is it going to solve the PROBLEM

How the heck is running rich going to make you burn oil??? :confused: I know fuel can get into the oil and dilute it, making it easier to burn, but not that much.

XLR8TOR
09-22-2005, 05:27 PM
How the heck is running rich going to make you burn oil??? :confused: I know fuel can get into the oil and dilute it, making it easier to burn, but not that much.

IMHO
If you get enough fuel in there that you wash off some of the oil film from the cylinder walls, you get more friction, which leads to more wear, which leads to more oil burining. Don't know if this is a known problem with LS1's, but it happens on carbed cars that have leaky carbs....

Mike00ss
09-22-2005, 08:38 PM
headers can make your car run rich which will cause some smoke i believe.
(you'll want to get it tuned)
Also...the pcv systems in the LS1 allow for alot of oil to get "inhaled" back through the intake thus burning off some of the oil sucked out of the valve cover.


Is there another way to tune our cars without having to dyno them?
thanks

02 BLK WS6
09-24-2005, 06:45 AM
my car burns 1 quart every 1,000 miles.... I work for Valvoline so it isnt a problem... DO NOT PUT THICKER oil in the car.... It will wear the oil pump...

10w30 Valvoline full synthetic is fine for LS1's.

JEB99TA
09-24-2005, 07:22 AM
Oil depends a lot on where you are and how hot you run your motor. Here Florida, I've tried every most weight oil Mobil1 makes. Seems like 10w 30 is the best medium for hot weather ... at least for me.

shaZZam
09-24-2005, 09:25 PM
I think there is a TSB on the oil consumption problems, TSB 01-06-01-011, but I can't download the file from work. I think this is the one for LS1's though.

joe_kool315
09-27-2005, 07:50 AM
here's a good link "if" you're still under warranty.

http://www.pistonslap.com/tsb.htm

I think GM has taken a firm negative stance as far as the customer is concerned. Another reason I'm considering jumping ship :cry: as much as I love my car $5 a quart every 500-1000 miles plus $280 a mo. in payments not to mention insurance, gas, tires etc... I think I'd be better off uping my payment $100 +/- and getting a charger (hopefully the srt-8 comes out pretty quick :) ) or heaven forbid a F ... uummm a FFFo .... I can't even make myself say it ... fffffffford :barf: there I got it out :jest: but the new rusttang ... I mean mustang has grown on me a little and hopefully the SVO cobra/gt500 (whatever the heck they end up calling it) won't be an arm and a leg & a first born child.