Originally Posted By: lazaro
Originally Posted By: Fahrfuwerfuelen
Just my 2 cents. I thought about Amsoil as I was researching oil for my VW TDI (diesel). If you want your warranty to cover repairs, the oil must have VW's certification as to VW 505.01 standards. The only way to get that certification was to submit a sample, plus $$$, to VW for testing. If the sample met the criteria, VW sends a letter and adds the product to their approved list.
One of the AMSOIL dealers on another forum kept insisting that AMSOIL's product "meets or exceeds" VW 505.01, yet no sample had ever been sent to VW for testing. This person kept insisting that it was OK to use this oil and that AMSOIL's warranty would cover repairs.
Well, the terms "meets or exceeds" are just marketing terms and somewhat misleading, at that. Several oil companies list their products with the "meets or exceeds" language, but do not have the approval to back up the claim.
Considering the long list of products which have been tested by VW and received the certification letter, I chose not to do business with companies who use marketing terms which mislead consumers.
I'll bet you your warranty wont be an issue with oil samples done every 20,000 miles, there is no way, unless the manufacture supplies the oil for free, that the manufacture can dictate what lube is in your crankcase, until you screw it up.
the manufacture dictating oil brands, sounds like companies who use marketing terms which mislead consumers.
VW didn't dictate which brand of oil to use, only that it meet VW Quality Standard VW 505.01. As of 9/11/07, VW had a list of 115 oils which meet that standard. Unfortunately, most of those oils are not available in the U.S., but there are several, so the owner has a choice.
There have been several instances of cam wear and failure because the 505.01 oil was not used. Given the OCI of 10k, I'd rather spend a few extra dolars and get an oil which will give me peace of mind.
Again, keep in mind, I talking about diesel engines and in particular, PD engines. The configuration of the cams and injectors for these models is different than your average gasoline engine and therefore the stresses and wear are of more significance.
AFAIC, anyone can put whatever they want in their engines. I just took offense to someone representing the product they market meets certain specifications when the product was never submitted for testing.