Burning Oil

[Kman]

How many miles?

The displacement on demand 5.3s are known for burning a quart or so during an oil change interval. Even right off the factory floor.

I've owned some 15 5.3 equipped GM vehicles in the last 10 years (business) and the non-DOD engines (pretty much the whole fleet) rarely lost more than 1/4 quart over 5000mi oil changes. With 200k or more miles, 1/2-1 quart isn't uncommon though.

I forget which year GM changed it, but I would look into having your PCV valve checked or replaced.

141k miles. I put the PCV valve from the LS1 into my truck. It's the one that doesn't have a ball valve, but rather a small hole at the end of the PCV valve. I believe this is the updated part? Part number of the PCV on the 2003 and up is FV410, that's what I put in my Tahoe. Old part was FV178.

Am I ok running the new part number?

 

[mackpro68]

On my 2004 5.3 120,000+ miles I have to use AC delco oil filter and Mobile1 oil or it will piston slap hard and it will used a quart between changes. On my wifes 2004 5.3 it will use any oil and filter and not burn a drop or piston slap.