Quote:
Originally Posted by FrankChastain
Thanks guys for the comments. One reason I posted was I have noticed on my wife's TrailBlazer, straight line six, is sometimes you hear a nock or bump when you start the car up, not it the morning, but other times. As I understand there is a valve, in the filter, that keeps oil from draining out of the block so to have oil in it for start ups. This is what I understand. The engine never did this until about 3 or 4 changes ago. I change the oil and filter every 3000 miles. Please correct me if wrong.....and again thanks..frankchastain
Please keep in mind this is a personal use car.....
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You are referring to the bypass valve.
Each car manufacturer has a specific setting for the bypass valve based on the engine design.
The worst offender of any oil filter is Fram; I stay away from them.
The best built and design oil filters are Wix (NAPA brand), Baldwin, Hastings and Amsoil.