[fastfredracing]

A good customer of mine is sitting at my front door Monday morning when I pull in . His 2010 5 series is making noise, and he wants me to look at it.
I have him start it, and ugh. Really loud rod knock from #5, or 6. After a few foul words, he calms down, and realizes that he has an extended warranty . I call them up , and the first thing they ask for is receipts for recent oil changes .
He has them, but has not been using synthetic motor oil, and has gone approx 6 k between each oil change .
The local quick lube guy stops down to my shop in a panic, fearing that it is his fault. I guess he told John ( BMW) owner that he would be fine using conventional oil , as long as he shortened his oil change intervals .
Do I honestly think that this caused the bearing failure? doubtful, but I can guarantee that the warranty company will deny the claim based on this information .
What do you guys think about this one ?