quote:Originally posted by ADFD1:
Originally posted by Tim Vipond:
[QUOTE]Originally posted by Big Bear:
Tim, I talked with my Amsoil rep last nite and it seems doing extended drains is not the easiest thing to do without some work and money by the guy doing the extended drains with Amsoil. He told me if your car is under warranty and the owners manual calls for a 5000 mile OCI and you want to run Amsoil for one year and lets pick 25,000 miles, you better be getting a UOA done every 5000 miles. He also said that each UOA at 5000 miles better look as good as Blackstones Universal Averages for a 5000 mile OCI. He said most of his customers are lucky to get about 13,000 miles out of the Amsoil motor oil while they are under warranty becuase of the driving they do.
He is wrong. No UOA is required when following AMSOIL's extended drain service intervals.
The man is giving his customers sound advise. Would you want to run oil with a TBN of ZERO. The UOA will give a snapshot of how the oil is doing.
I think he is giving poor advice. Why pay for UOAs when the oil has proven it has not caused a parts failure in 38 years?
Only a fool would extend drain intervals without doing oil analysis. What happens when you lose an O-ring in a injector, but the oil is still under the mileage warranty? Who'se to blame? Case in point - a fleet I work with has been doing extended drains for many years...with great success. A recent oil analysis showed fuel dilution. With that information, they tested other trucks in the fleet. Many trucks in the 800k mile range were starting to show fuel dilution. The problem was quickly identified (O-rings on injectors starting to leak) and taken care of before catastrophic failure. Assuming it was Amsoil in the engine and UOA wasn't necessary and eved discouraged as a waste of money, who would be to blame if they didn't catch the problem in time? My guess is Amsoil would blame the ULSD fuel and, of course, the end user.