Funny you should mention it, I just changed over to synthetic last night. I went with Amsoil 15W40. I have always been a Delvac 1 guy for diesels, but I have read good comments on the Amsoil. The price helped as well - I paid $18 gal vs. $22 gal for the Delvac 1. I will continue with Delvac for my Jetta since it only takes 1 gal and that is what it has always had. Also, I saw the yellow cap Delvac 1 at Wally World as mentioned in earlier threads. It says it is Truck & SUV Mobil 1, but has all the diesel ratings. It was $4.75 qt or something like that. Actually cheaper than buying a gallon of Delvac 1. Interesting. Do I dare trust that it is Delvac 1 and use that on the jetta next time??
