Bo (in particular) and all others in general -

I respect the research and knowledge you all shared in this thread re: Mobil, spec. inconsistencies, etc. I have been a long time user of Rotella-T 15W-40 in my MB diesels and Mobil 1 in my gassers. My concern is over which synthetic diesel oil to use in a newly aquired VW TDI diesel which VW lists 5W-40 (dino or synthetic) as the preferred .

The no-brainer would be to use Delvac 1. However, I'm ready to throw in the towel on Mobil due to the points outlined in this thread and the difficulity I have finding a convenient source of supply in Mpls./St. Paul, Minnesota area.

I am ready to switch to Amsoil; they seem to be a consistent, no nonsense supplier that imparts a high level of integrity to the products they manufacture. I can order on-line and have product shipped to my door or stop in at my local jobber who maintains inventory in Mpls. I can also do 'will-call' pick ups at Amsoil's home base when I am in the Duluth/Superior area. The Amsoil recommended product for the TDI is their Series 3000, 5W-30 Heavy Duty Diesel oil.

Question: Should I have any concern about the fact the best Amsoil product for the TDI is available only as a 5W-30??

The Amsoil tech service people say it is not an issue and, in fact, their 3000 Series HDD oil compares favorably with other brands 5W-40. A check of the Amsoil Series 3000 5W-30 product specs. seems to bear this out. The only difference I detect is a slightly lower viscosity at 100 C. Otherwise, the Amsoil product seems to spec out very favorably to Delvac 1 in most tests and superior to Delvac 1 in pour point (a plus in Minnesota).

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04 GMC Yukon XL Denali, Black, 12k
02 New Beetle, TDI, Reflex Silver, 24k
89 300TE, Arctic White, 214k

90 300E, 142k (sold)
87 300TD, 128k (sold)
83 300D, 314k (sold)
79 300TD, 266k (sold)

Share your knowledge -

Wayne