Mobile1 Full Syn 15w50 for my VR. I would like to think that if you changed your oil every 3000 miles under normal driving conditions than regular oil would be fine. Since I have some modifications and like to drive it like I stole it--sometimes-- than a better oil is good insurance.
On that note, I currently have tried VW Oil from the dealer, Mobil 1, and Kendall Fully Synthetic and have determined that Mobil 1 5W-30 is the best mass-market oil out there to use. I run it 10,000 miles and the motor is as smooth as ever.
I ended up buying the rotella t 5w40 stuff in the blue jug for like 16 bucks a gallon, my vr runs better and seams to like the stuff.
I always get Mobil 1 0w40 ... it's 502.00 and VW approved !
I am using Rotella T 5W 40 in my 1.6NA diesel and in my TDI. I have noticed no bad effects. The oil consumption is nil and there are no leaks, etc.
I rebuilt a 1.6TD, my first rebuild about 16 years ago, and it had Mobil 1 15w50 since day one. I sold the car with 550,000 miles on the engine and it was still purring.
In my area, I always been able to find Shell Rotella T 5w40 synthetic motor oil. It's a Group III oil and is capable of 10K mile oil changes in the AHU/1Z/ALH TDI engines and should do fine for your TD.
I have used Rotella full synthetic 5w40 from day 1. No complaints. I work for an oil distribution company, and get to ask people questions that have been in the business before I was born. Eveyone of them says the same thing. Shell has forgotten more then the others will ever know.
Run Mobil 1 and you need nothing else. I change the oil every 10K, at 150K still going as strong as ever.
When I bought my (new) 2002 Jetta, I did quite a bit of research on the various synthetic oils for turbo diesel engines. I came away the most impressed with Mobil Delvac-1 in the SILVER jug. The numbers that were available online seemed to suggest that this was one of the better choices. I've run Delvac-1 since my Jetta's first oil change. Not the cheapest synthetic out there, but I've been happy with what I've seen.
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