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Is that true that GTO's (from new) especially 05 and 06's burns about qt. of oil every 3000 miles?
 

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My '05 did burn about a quart per oil change for the first 3-4 changes, about 10-12,000 miles. It has not burned anything significant since.
 

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I understand that 1 quart in 3,000 miles in within GM limits, but mine hasn't used oil. Got 33,000 on an 05 yellow jacket.
 
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oil use

my 05 does not use a drop of oil, I change it every 2 to 3 thousand miles and I use only ROYAL PURPLE oil....GM made a big mistake by putting in full synthetic oil at the factory,, Full Synthetic oil will NEVER let a new engine break in properly..on the day I took delivery of mine [ it had 4 miles on it ] I had the dealer change the oil and used MOBILE ONE non synthetic oil.. I did not put full synthetic oil in it till it had over 5000 miles on it
 

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My '05 did burn about a quart per oil change for the first 3-4 changes, about 10-12,000 miles. It has not burned anything significant since.
:agree Mine also used oil during the first 8,000 miles. Went thru the first quart in about 900miles. It's now down to about 3/4 quart in 2000miles. The engine has 9,500 miles on it. I change oil at about 2000-2500miles. Sounds like we are seeing reports here that these LS2 engines go 5000mile plus and don't burn a drop! That is incredible. My friend has an LS6 that finally dried up after 15,000 miles. I hope mine will continue using less oil but will be happy if it goes 2000-2500miles on a 1/2 quart. I do like to wind it up frequently. I have owned many high performance cars and have never had one that did not use a drop of oil between the 2000 mile oil changes. The best I ever saw was 1/4 quart / 2000 miles, my wifes stock LT-1 Z-28. I am not saying that other guys cars can't go 5000 miles and use no oil, just that I have never had that experiance with my performance engines.
 

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There a ton of GTOs reporting oil consumption over the much bigger LS2GTO board; you can do a search there.
But I can attest myself that if you guys don't have a 'catch can', a lot of that oil is probably being ingested courtesy of the PCV valve.
I installed a catch can (EE), and after a 2K-mile trip to Vegas, the can trapped about 1/2 pint, and this was with very easy driving. When I replenished that oil with new one, the oil level was practically where it was when I changed the oil (negligible oil consumption).
You also need to check your oil at the same spot every time, and after car has been parked for a while. This will ensure consistent readings. But put a catch can of some sort, to leave the PCV-fed oil out of the equation. Later.
JC
 
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