2007 F150 5.4L with Gryphon

[88Racing]

If you brought a vehicle into the dealer here with those codes. The viscocity tests is one of their tried and true tests to get out of a warranty claim. But that is just one of their many process of elimination proceedures.

And to my understanding there is more people out there running the wrong weight or less than spec oil.

There are so many variables in this situation.

My rules on oil changes
1). I buy the oil and filter.
2). I do the change or bring it to a place where I supervise.
3). Viscosity tests are done on both new and used oil.
4). For whatever reason the vehicle never leaves my sight!!!
5). Anything dropped on floor gets inspected thoroly. If oil filter gets dropped that one is thrown, and another new one comes out of the box.
6) Always check dipstick for oil before departing service center.

Sounds kind of anal doesn't it. Sometimes other peoples mistakes will haunt you for the rest of your life.

Lars.