How offen do you add engine oil?
Thread Starter
Drifting
Joined: Oct 2007
Posts: 1,673
Likes: 2
From: Titusville FL
How offen do you add engine oil?
I've had my mostly stock 99 Hard Top with now 28K miles since last October (~5 months). I've driven her ~2500 miles. I've added about a quart during this period. Is this normal?
Driving habits = not very aggressively, however I do put my foot in it once in awhile.
Thanks in advance for your advise.
BUGZ
Driving habits = not very aggressively, however I do put my foot in it once in awhile.
Thanks in advance for your advise.
BUGZ
Melting Slicks
Joined: Nov 2003
Posts: 2,898
Likes: 5
From: Plainfield, IL
Hope this helps,
J.T.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Thread Starter
Drifting
Joined: Oct 2007
Posts: 1,673
Likes: 2
From: Titusville FL
Thanks for the replies. Sounds like I may have an oil consumption problem. 
Anybody have an in site on what the contributing factors could be for having to add oil between changes?? The guy I bought it from said he put in oil that was supposedly better than Mobile 1, not the Purple stuff, something else...don't remember the name. I don't have any leaking or blue exhaust.
Anybody have an in site on what the contributing factors could be for having to add oil between changes?? The guy I bought it from said he put in oil that was supposedly better than Mobile 1, not the Purple stuff, something else...don't remember the name. I don't have any leaking or blue exhaust.
Pro
Joined: Oct 2006
Posts: 562
Likes: 0
From: Gulf Coast Texas
Thanks for the replies. Sounds like I may have an oil consumption problem. Anybody have an in site on what the contributing factors could be for having to add oil between changes?? The guy I bought it from said he put in oil that was supposedly better than Mobile 1, not the Purple stuff, something else...don't remember the name. I don't have any leaking or blue exhaust.
Anybody have an in site on what the contributing factors could be for having to add oil between changes?? The guy I bought it from said he put in oil that was supposedly better than Mobile 1, not the Purple stuff, something else...don't remember the name. I don't have any leaking or blue exhaust.
Premium Supporting Vendor
Joined: Aug 2001
Posts: 5,364
Likes: 38
From: King George VA
Oil loss can come from a variety of sources. Most common in LSx motors is oil loss by the rings into the cylinders and out the exhaust. This is most common at high rpm, low load conditions and was very common in the early LS6 motors that had numerous TSBs out on oil consumption. Depending on how you drive, this may or may not be noted by some. Other possible causes include loss into the PCV system (take off the intake at the throttle body and see if you have oil in front of or behind the throttle plate). To correct this, many guys that track the car disconnect the PCV system from the intake (where it dischages to) and connect it to a catch can. Then there is the obvious oil leaks. Not really sure how common any of these were on the LS1 in the 99 FRCs, but suspect that there are similarities given how similar the LS1 is to the LS6.
You might try a google search for TSBs (technical service bulletins) on your car and look for titles regarding oil consumption.
Another common cause often overlooked, and probably the primary difference between the losses from one oil brand to another is the oil's volatility. Many low cost oils essentially evaporate at the oil temps seen in the Corvette. For an example, look at the NOACK Volatility results on this AMSOIL commissioned test:
Comparative Motor Oil Test Nov 05
You might try a google search for TSBs (technical service bulletins) on your car and look for titles regarding oil consumption.
Another common cause often overlooked, and probably the primary difference between the losses from one oil brand to another is the oil's volatility. Many low cost oils essentially evaporate at the oil temps seen in the Corvette. For an example, look at the NOACK Volatility results on this AMSOIL commissioned test:
Comparative Motor Oil Test Nov 05
__________________
C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
Race Director
Joined: Apr 2007
Posts: 19,758
Likes: 523
From: Ideals are peaceful...History is violent...St.Charles, MO.
2020 Corvette of the Year Finalist (appearance mods)
C5 of Year Winner (appearance mods) 2019
St. Jude Donor '08-'09-'12 thru'22
60K mileage and only when I change the oil.
Pro
Joined: Aug 2007
Posts: 676
Likes: 2
From: Amherst VA
To the OP: 58K, no oil consumption here, and I don't baby it but I don't beat it to death either.