Engine oil Mobil or PENNZOIL

Easiest to find is Mobil 1 0W-40, Porsche's recommended fill.

I use mobil 1 0w40 and it makes a big difference

0w - 40 Mobile 1 was all I used for over 3 years, and the R was flawless until I sold her.

I use Mobil 1 0w-40 in my car (1.8T) because it is readily available, VW approved, has good performance and a decent price.

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 always get Mobil 1 0w40 ... it's 502.00 and VW approved !

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.

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.