I own an 06 VW Jetta TDI with the Pump Duse (PD, camshaft/roller driven injectors) direct injection disel. As many here know, the oil VW requires is 505.01.
In any case, I am not impressed with the protection this oil provides my engine. I can see 2 cam lobes and 1 PD roller through the filler. I see visible wear at 16K miles. No, it is not significant enough to warrant a dealership visit, but I think the oil is at it's limit protecting these parts.
So, I started thinking about the huge argument over at the TDI forums and the use of Delvac 1. I also thought about the users of these engines who are having 90K camshaft failures, some even were dealer serviced. This post is not here to fault dealerships, just discuss oil.
I think the viscosity is too low to protect the parts properly. Here in South Florida, we often can get better UOA by stepping up a grade in viscosity. I am certain the PD engine is no different. All the additives in the world cannot prevent wear if viscosity is too light to handle the load. (BTW, I got this idea from my turbo miata which gets good UOA only with thick oils).
What do you guys think? Maybe the 5W-40 is too thin to protect the cam and very high pressure PD roller? I am considering switching to a slightly thicker diesel oil.
Chris
In any case, I am not impressed with the protection this oil provides my engine. I can see 2 cam lobes and 1 PD roller through the filler. I see visible wear at 16K miles. No, it is not significant enough to warrant a dealership visit, but I think the oil is at it's limit protecting these parts.
So, I started thinking about the huge argument over at the TDI forums and the use of Delvac 1. I also thought about the users of these engines who are having 90K camshaft failures, some even were dealer serviced. This post is not here to fault dealerships, just discuss oil.
I think the viscosity is too low to protect the parts properly. Here in South Florida, we often can get better UOA by stepping up a grade in viscosity. I am certain the PD engine is no different. All the additives in the world cannot prevent wear if viscosity is too light to handle the load. (BTW, I got this idea from my turbo miata which gets good UOA only with thick oils).
What do you guys think? Maybe the 5W-40 is too thin to protect the cam and very high pressure PD roller? I am considering switching to a slightly thicker diesel oil.
Chris