Downside to overfilling oil??
Thread Starter
TECH Fanatic
iTrader: (15)
Joined: Jun 2006
Posts: 1,155
Likes: 0
From: Janesville WI
Downside to overfilling oil?? I've read recommendations to overfill the LS1s w 1/2 to 1 full quart of oil b4 racing/autocrossing events.
There has 2 b some downside, right? Otherwise why wouldn't everyone overfill, why wouldn't GM for that matter if it prevents engine damage (warranties).
The last thing I want is to spin a bearing, but just adding a 1/2-1 quart seems to good to be true.
What do your experience guys think?
Sam? Mitch? Other knowledgable guys?
There has 2 b some downside, right? Otherwise why wouldn't everyone overfill, why wouldn't GM for that matter if it prevents engine damage (warranties).
The last thing I want is to spin a bearing, but just adding a 1/2-1 quart seems to good to be true.
What do your experience guys think?
Sam? Mitch? Other knowledgable guys?
Originally Posted by mitchntx
Downside? It will burn it. You will come away with a lot of soot on the rear bumper cover.
I ran my street car at 7qts with a filter all the time.
I ran my street car at 7qts with a filter all the time.
I guess my feeble attempt at humor didn't make much of an impression. 
What I was trying to get at is IF you have a power adder (blower, turbo, NO2) over filling will increase the crank case vent problem where you blow the dipstick out. (because the oil level is now above the bottom of the dipstick tube in the pan) But I always run an extra 1/2 to 1 qt, I just put a breather on my catch can to fix it.
What I was trying to get at is IF you have a power adder (blower, turbo, NO2) over filling will increase the crank case vent problem where you blow the dipstick out. (because the oil level is now above the bottom of the dipstick tube in the pan) But I always run an extra 1/2 to 1 qt, I just put a breather on my catch can to fix it.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Registered User
Joined: May 2007
Posts: 11
Likes: 0
Originally Posted by SHELBYGLHS
I do the same, one qt over.
Joined: Nov 2001
Posts: 10,023
Likes: 6
From: LT1 land...the "409" of the 90s!
I used to run 1/2 to one Qt over when running hard. this always kept oil in the pan and the bearing alive when running over 6,000 non stop 
Mark RR guys don't run power adders
Mark RR guys don't run power adders
just ordered 7 quarts of Redline 5w30; i'm a big autocrosser and want to do an upcoming event at Pocono, and maybe Limerock if I can get my high speed tires in time.
After reading enough about this, I'm going to use the truck filter and drop in all 7.
After reading enough about this, I'm going to use the truck filter and drop in all 7.
12 Second Club
Joined: Sep 2005
Posts: 4,273
Likes: 0
From: Bucks County, Pa.
Originally Posted by Rescue Ranger
just ordered 7 quarts of Redline 5w30; i'm a big autocrosser and want to do an upcoming event at Pocono, and maybe Limerock if I can get my high speed tires in time.
After reading enough about this, I'm going to use the truck filter and drop in all 7.
After reading enough about this, I'm going to use the truck filter and drop in all 7.
Originally Posted by dailydriver
Get yourself some KONIS!! When did the SCCA switch f bodies from F stock to A stock (or is it just the SSes/WS6es)?? (This is in response to your sig, not your post, but I would consider mixing in at least 3 quarts of RL 10W-40 with those other 4 qts. of 5W-30 for summertime open track/time trial/HPDE events!)
SS/WS6 F-Bodies are A-Stock, all 1996 - 2002. Its such a poor classification, and a lot of people are pushing to have them moved to FS.
Redline 5w30 performs very well from what I understand per BITOG and Patman, and it runs pretty thick also.
Would anyone else recommend a RL 10W40/5W30 mix?
Originally Posted by WAHUSKER
I read on one of the road race forums that LT1s can actually over heat if you over fill them. I need to verify this with my buddy, but just in case I thought I'd share.....
Just got back from 2 days at Watkins Glen and plenty of high rpm driving....no issues whatsoever with overheating. As a matter of fact, I was very impressed with how good the engine ran, never came close to overheating. I was able to get my lowly LT1 Z-28 faster through the Esses than I did in my Z-06 last year. That track is AWESOME! Heading to Boston next Saturday for Devens and the 1.6 mile autocross track. Back to Watkins in August. Can't wait!
Originally Posted by H82GOSLW
Just got back from 2 days at Watkins Glen and plenty of high rpm driving....no issues whatsoever with overheating. As a matter of fact, I was very impressed with how good the engine ran, never came close to overheating. I was able to get my lowly LT1 Z-28 faster through the Esses than I did in my Z-06 last year. That track is AWESOME! Heading to Boston next Saturday for Devens and the 1.6 mile autocross track. Back to Watkins in August. Can't wait!
I might see you there, that track was a blast last month, and I ran it on street tires
Now i have slicks, so it should be a blast!
I think my next oil change i'm gonna add 6 quarts instead of 5.5..i usually have to add half a quart or so in between oil changes...so i figure even if it is a little over filled it will burn it off anyways..Plus not to mention that i'm kinda sick of having half a quart left over after every oil change..when i end up adding it anyways later on..