After an oil change on my 2008 Acadia at Mr. Tire, a Monroe subsidiary, a piece of glue came off the filter and lodged between the head gasket and block resulting in $2400 in damages. This is their reply ".... they do not feel the damages are related. The piece in question is between the metal casing and the element. They feel the piece in question would never have made it through the element into the engine as it is the job of the element to stop particles from entering the engine." There is a GM bulletin warning of aftermarket oil filters could cause engine damage and in 2011 GM changed their own filter design used on GM 3.6 engines. I contend oil filters have a bypass that under pressure will allow unfiltered oil into the engine. I have documentation that says the piece made it into the engine and have the piece and cut apart filter showing where the piece dislodged, how do I prove the Valvoline filter caused the damage, thanks for your time.