1loudz

what is the normal oil consumption for an LS1. im an LT1 guy, and mine doesnt burn any whatsoever, but my buddy is getting kinda worrried in his 01' Z28. He says that he has been burning 1 quart per 1000 miles for quite some time now. and just last week he burned 1 quart after just 500 miles. is this normal, or what could be the cause.
P.S. : his car has full exhaust/intake as well as custom programming.

any help would be appreciated.
Ryan



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94' Polo Green Z-28 M-6 Hardtop
Mods:
Borla cat-back (wide open most of the time)
CAGS!
Custom made Cold Air Induction, W/ ram air
K&N filter
1LE Elbow
MAC mid-length headers
MAC y-pipe
MAC off-road pipe
LT4 Knock Module
160' Hypertech
SLP 3-way fan switch
custom tuning from Bryan Herter at pcmforless.com
Over the valve cover Taylors w/ rapidfire plugs
17x9 ZR1 wheels w/ Eagle F1's
Pro 5.0 Shifter
Best corrected 1/4 mile: 13.47 @ 105 w/ a 2.35 60' @3100ft.

STS-Formula

I remember seeing a post saying that if your LS1 eats more than 1 1/2 quarts every 2,000 miles, the dealer will fix it, rings, pistons, etc....Do a search for it.
Good luck and TTT
STEVE

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99 TA--A4
MAC headers/ORP, Hooker catback, Whisper Lid, MAF ends, MAFT, FTRA, Holley Powershot, BMR LCAs, EGR mod, HPP3, 160*Stat, Richmond 3.42s
With just a K&N
299.3 RWHP
285.4 RWTQ

jgkinsofla

Here's a Tech Service Bulletin on it -

Bulletin No.: 01-06-01-023

Date: October, 2001

Subject: Higher Than Expected Oil Consumption (Replace Rings)

Models:
1999-2001 Chevrolet Camaro, Corvette
1999-2001 Pontiac Firebird
with 5.7L Engine (VINs G, S - RPOs LS1, LS6)

Condition: Some owners may comment on higher than expected oil consumption. When checked, the oil consumption could be in the range of 400-600 miles per quart (700-1000 km/L).

Cause: The cause for this condition may be an interaction between the piston rings and the cylinder bore in vehicles that are operated at higher RPMs - typically manual transmission vehicles driven in a manner where the engine is frequently or consistently operating at greater than 3200 RPM.

Correction: A new set of piston rings is currently available through GMSPO. The new rings are part of a complete piston ring kit. Install only the number 2 compression ring and the oil expander ring from the piston ring kit. All other rings in the piston ring kit should be discarded. The original number 1 compression ring and the oil ring rails should be re-used in their original positions on the piston. All pistons should be used in the same cylinder bore.

Important: Do not dress or hone the cylinder bore. Nothing should be done to change the bore finish for this condition. Changing the bore finish may aggravate the condition.

Refer to the Unit Repair Manual for appropriate ring removal and replacement procedure.

The number 1 compression ring and the upper and lower oil expander rails are re-used because they are already broken in for the bore that they are in. The new number 2 compression ring is made with a very sharp edge that will break in quickly.

Changing only the piston rings noted, with no change in driving style, should change oil consumption to an acceptable level. Changes in driving style that reduce the amount of time spent at higher RPMs will also positively effect oil consumption.

In addition to the standard size piston ring kit listed below, a 0.25 mm oversized piston ring kit is available. The oversized piston ring kit should only be used in those rare instances where the cylinder bore size has been machined larger to accommodate the 0.25 mm oversized piston rings.



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'99 Z28 A4 BLACK
▪ SLP air lid, K&N filter, air box mod, Borla exhaust, HPP3, 160* stat, Magnecor 8.5 mm wires, NGK TR55 plugs
▪ Pioneer DEH-P77DH, Polk speakers

jgkinsofla

Here's some excerpts from another TSB -

Bulletin No.: 01-06-01-011

Date: March, 2001

Subject: Information on Engine Oil Consumption Guidelines

Models:All 1996-2001 Passenger Cars and Gasoline Powered Light Duty Trucks Under 8500 LB GVW

This bulletin is being revised to add Model Years 2000 and 2001. Please discard Corporate Bulletin Number 76-60-04A (Section 6 - Engine).

All engines require oil to lubricate and protect the load bearing and internal moving parts from wear including cylinder walls, pistons and piston rings. When a piston moves down its cylinder, a thin film of oil is left on the cylinder wall. During the power stroke, part of this oil layer is consumed in the combustion process. As a result, varying rates of oil consumption are accepted as normal in all engines.

Oil Consumption

The accepted rate of oil consumption for engines used in the vehicles referenced is 0.946 liter (1 qt) in 3200 km (2000 mi). This rate only applies to personal use vehicles, under warranty, maintained in accordance with the appropriate maintenance schedule, with less than 58,000 km (36,000 mi), or 80,450 km (50,000 mi) for Cadillac, driven at legal speeds in an unloaded (for trucks) condition.

Many factors can affect an owner's concern with oil consumption. Driving habits and vehicle maintenance vary from owner to owner. Thoroughly evaluate each case before deciding whether the vehicle in question has abnormal engine oil consumption.
_ _ _ _ _ _ _ _ _ _

Also contained in this TSB is an oil consumption "data sheet" that you have to go back and forth to the dealership like a dozen times, so they can monitor the consumption.

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'99 Z28 A4 BLACK
▪ SLP air lid, K&N filter, air box mod, Borla exhaust, HPP3, 160* stat, Magnecor 8.5 mm wires, NGK TR55 plugs
▪ Pioneer DEH-P77DH, Polk speakers