I've dealt with Amsoil and service managers at dealerships for many years. The only concern you will EVER have with a service manager regarding Amsoil is that you follow the manufacturers recommended service intervals while the vehicle is under warranty. I recently took my 2002 Audi TT in for the free service and supplied my own Amsoil 10w-30. They were more than happy to put it in and mentioned that many of their TDI diesel customers also bring in Amsoil to be installed. A number of my customers also take their Amsoil to dealerships or quick lubes to be installed. Quite honestly, the only question I'm ever asked is where to buy the stuff ...
If you have an engine failure with Amsoil while following manufacturers recommended drain intervals, it will be for one of three reasons:
1) There is a design defect in that particular engine - in that case it will affect hundreds if not thousands of engines and there will be some sort of recall program.
2) You allow the oil level to get several quarts low and it overheats
3) There is some sort of abnormal contamination from coolant, fuel or dirt - any of which will clearly show up in a $20.00 oil analysis.
BTW, the main reason why manufacturers recommend using an API licensed oil is to at least insure you find a product that meets minimum quality levels. A recent articles in Lubes and Greases magazine mentioned that 15%-20% of the market share for engine oils still goes to API, "SA" and "SB" rated, non-detergent products that may sell for as little as 69 cents a quart. These nondetergent oils are totally unsuited for use in any modern engine.
To put things in perspective, the API licensing program has only been in effect since about 1990 and the API "Certified for gas engine" program was first introduced in the mid 1990's. The primary reason for the starburst is to encourage folks to use 5w-20 and 5w-30 grades to promote high fuel efficiency.
If you intend to run extended drain intervals in vehicles under warranty, I do recommend supporting them with some oil analysis testing. Oil analysis is considered legal proof that the oil is still servicable.
TS
If you have an engine failure with Amsoil while following manufacturers recommended drain intervals, it will be for one of three reasons:
1) There is a design defect in that particular engine - in that case it will affect hundreds if not thousands of engines and there will be some sort of recall program.
2) You allow the oil level to get several quarts low and it overheats
3) There is some sort of abnormal contamination from coolant, fuel or dirt - any of which will clearly show up in a $20.00 oil analysis.
BTW, the main reason why manufacturers recommend using an API licensed oil is to at least insure you find a product that meets minimum quality levels. A recent articles in Lubes and Greases magazine mentioned that 15%-20% of the market share for engine oils still goes to API, "SA" and "SB" rated, non-detergent products that may sell for as little as 69 cents a quart. These nondetergent oils are totally unsuited for use in any modern engine.
To put things in perspective, the API licensing program has only been in effect since about 1990 and the API "Certified for gas engine" program was first introduced in the mid 1990's. The primary reason for the starburst is to encourage folks to use 5w-20 and 5w-30 grades to promote high fuel efficiency.
If you intend to run extended drain intervals in vehicles under warranty, I do recommend supporting them with some oil analysis testing. Oil analysis is considered legal proof that the oil is still servicable.
TS