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Ask Chad Farhat Your Own Question
Chad Farhat
Chad Farhat, ASE Certified Technician A6 - Electrical / Electronic systems A7 Heating / Air conditioning systems
Category: Chevy
Satisfied Customers: 2727
Experience:  Owner at Carolina Auto Service & Sales , 20 years Experience in Foreign & Domestic vehicles A6 - Electrical / Electronic systems A7 Heating / Air Conditioning systems
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Oil in air filter, 3000 miles ago full synthetic. 2007

Customer Question

Oil in air filter
JA: When was your last oil change?
Customer: 3000 miles ago full synthetic. 2007 suburban 187000 miles
JA: What is the model of your '07 Chevy?
Customer: 1500 ltz
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: Cleaned out air filter housing and rubber tube leading to throttle body. Oil was laying in the corrugated sections. Will let dealer handle but I want to point in right direction
JA: Anything else you think the mechanic should know?
Customer: No
Submitted: 8 months ago.
Category: Chevy
Expert:  Chad Farhat replied 8 months ago.

Hi, I'm Chad ,Welcome To JustAnswer, I'm reviewing your question and I will be be posting a replay ASAP

check the pcv valve first .

what is the mileage ?

Please let me know

Thank You

Chad Farhat

ASE Certfied Technician

Customer: replied 8 months ago.
There is no pcv valve on 2007 suburban 1500. Mileage is 187000. But I am wondering if pcv system has sludge.
Customer: replied 8 months ago.
Or am I just getting alot of blowby. But the car does not smoke and still has good power. No problem going 85 to 90 or climbing mountain passes
Expert:  Chad Farhat replied 8 months ago.

2 reasons you will have this oil in the air filter blow by ( no smoke and has power is a good sign of no blow by , but you will see lack of power especially under load ?& you are not

or sludge in pcv system like you said

do you pull a trailer , what u use the truck for just daily driving or a work truck ?

Customer: replied 8 months ago.
No not lately. But we go up and down a lot of mountains. I am thinking a oil flush at dealer.
Customer: replied 8 months ago.
Thank you for your help. I think I know how to proceed
Expert:  Chad Farhat replied 8 months ago.

yes , oil flush be good, one last thing ,still use full synthetic, but go higher on the weight in case it is to thing of oil for it ,since we are at 187k miles

which is really not a lot of miles on a diesel

good luck

Please let me know if you need anything else on it

Hope I was helpful to you

A Positive Rating is Much Appreciated

This Post Will Stay Open for You To Come back And Ask me Any Follow Up Question You May have.

Thank You

Chad Farhat
ASE Certified Technician