Nick. What do you think about the 15000 mile change intervals being pushed by some of the synthetic companies?
I think it is possible as long as the companies stand behind their product and engineer it for that distance. If you look at BMW and Mercedes they recommend 10 and 15k mile oil changes. VW has been recommending 10k for a while now on gas and diesel vehicles.
The downfall to it is the average individual will fall behind on other preventative maintenance as well as keeping track of oil level. I run into that now with some of my customers. They feel just because they don't need to change their oil but once a year that they don't need to check it either.
I figure change at 4K for first three then go by the computer after that.