Burning Oil '05 Suburban
#1
CF Veteran
Thread Starter
Burning Oil '05 Suburban
Good day
Our 05 Suburban with 5.3l has about 250k miles and runs fine. Historically I rarely needed to add oil between changes. In the last 6 months, we get a big blue puff at most start ups and I an adding 1-2 quarts every 3-5 weeks. Seems like quite a sudden change vs slow wear and tear. So:
1. No test, what's your 1st guess
2. Tests to diagnose
This is my wife's DD and our trusted mechanic does all the routine care. He tried some additive 2 months ago; no change. He kind of suggested a crate motor as a fix.
Thanks in advance for your suggestions!
Red
Our 05 Suburban with 5.3l has about 250k miles and runs fine. Historically I rarely needed to add oil between changes. In the last 6 months, we get a big blue puff at most start ups and I an adding 1-2 quarts every 3-5 weeks. Seems like quite a sudden change vs slow wear and tear. So:
1. No test, what's your 1st guess
2. Tests to diagnose
This is my wife's DD and our trusted mechanic does all the routine care. He tried some additive 2 months ago; no change. He kind of suggested a crate motor as a fix.
Thanks in advance for your suggestions!
Red
#2
I'm here for the party
so he want to replace the motor for a little oil burning??? try replacing the mechanic. worst case in my mind is gummed up o-rings but take a look here
https://chevroletforum.com/forum/gen...ing-oil-19313/
https://chevroletforum.com/forum/gen...ing-oil-19313/
#3
CF Veteran
Thread Starter
So just to quantify, 1400 miles about half on the highway, needed 2 quarts today.
Surprised I didn't get more responses/suggestions.
So how about if I ask "What would you do if this was your rig?"
Surprised I didn't get more responses/suggestions.
So how about if I ask "What would you do if this was your rig?"
#4
check for leaks
#6
Like Irish posted, you want to look at restrictions in crankcase ventilation, ie. PCV valve and hoses.
Other than that you're looking at worn valves or pistons. I see no reason why a ring can't break or seal can't fail suddenly. Do a compression test to be sure.
Other than that you're looking at worn valves or pistons. I see no reason why a ring can't break or seal can't fail suddenly. Do a compression test to be sure.
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