elevator_idiot

iTrader: (1)

I have a 2004 yukon xl with a 5.3L and it is consuming enough oil to hit the low oil sensor. It does this even bofore the 5000 mile mark. What is the deal it doesn't leak a drop. PCV blowby or is it the rings? The truck only has 75,000 miles on it.

Any insight would be appreciated...

bow tie guy

my buddy has had a 5.3 sierra for 9 years going on 10.
He says it's used a quart and sometime two between oil changes since the day He brought it home

He runs relatively thin synthetic probally 15-30
mobil 1 since new
I always tell my freinds ambient temp determines viscosity!.

anyhow, it's common for these 5.3's to use oil between changes. perhaps try a thicker viscosity, esopecially if the weather has been on the hot side as of late

Truckshop

iTrader: (17)

How far are you going on oil changes? Depending on what oil you are using 5000 miles should be max. And how long?

00ChevyScott

iTrader: (10)

I'd bet it's the PCV system. Have him pull the TB off and look in the intake for oil.

elevator_idiot

iTrader: (1)

Definitely some oil in the intake. What gives? Would a catch can help? I thought they were only necessary on forced induction motors. I use Mobil 1 5w30 I will try 10w30 next oil change since it is pretty hot here in SoCal in the summertime. I know 5000 is a lot between oil changes but it is my wifes car and it really doesn't get beat on or anything.