Originally Posted by fred43
this was not oil related, the amoils was on vws list as aproed lube. the tdi must have synthetic oil. you void the warrenty if you use anything but synthetic. this is a junk cam with a flat tappet. if i had known it was a fat tappet cam engine,,i never would have bought the thing.
Sorry to let you know, that Amsoil is NOT Volkswagen approved.
Amsoil claims it meets VW specs, but it is surely not VW approved. That means VW did not do any extensive testing with it and you are on your own. With that, your cam failure is oil related.
: Sorry to bust your bubble... :RTFM:
Here is a c/p:
PART TWO: "Pumpe-duse" engines.
You must use an engine oil that explicitly states that it conforms to VW 505.01, 506.01, or 507.00. NOTHING ELSE. Common choices are Castrol 5w40 TXT 505.01 (do NOT confuse this with the regular European-car formulation of Syntec 5w40, it is not the same), Elf Excellium VW 505.01, Motul 6100 VW 505.01, Motul Specific 505.01, and there are others. ALL such oils prominently state 505.01 in large letters on the bottle. If it doesn't have that, it is NOT ACCEPTABLE.
Due to the limited number of VW diesels in North America, these oils are typically available only at VW dealers and parts vendors that specialize in VW cars. Other parts vendors might be able to special order it, so ask. To forestall another question, this is NOT a "monopoly". Engine oil vendors outside of VW dealers are perfectly free to market oils that meet VW's standards. The fact that not many have chosen to do so is THEIR fault, not VW's.
Beware the "meets or exceeds" game. The oil has to be certified to these standards by VW themselves. Amsoil is one notable oil brand which does not pay for such certification. They produce an oil which states VW 505.01 on the bottle, but it is not on VW's list of certified oils. That doesn't mean it's a bad product ... it just means that if something bad happens, there is a possibility that VW isn't going to warranty it (on the grounds that you did not use one of VW's certified oils), and if that happens, you are going to have a battle on your hands. It is BEYOND THE SCOPE OF THIS THREAD to explore the fine points of VW 505.01 certification, the subject has been beaten to death elsewhere with no end in sight, this thread merely serves to make you aware of the situation.