RMalone said:It won't hurt ANYTHING to go back to dino oil. I have seen Amsoil literature that says no harm in mixing Amsoil with dino at the same time!!
How in hell can it be cheaper for him to run amsoil for the next two years???
The dealer is covering oil changes "no charge", seems to me bringing his own Amsoil for a change, even once, will cost him more than "no charge".
I agree synthetic is better than dino, Amsoil is first-rate, however good dino isn't junk. When you are paying for oil-changes the extended drain interval on synth helps even up the added cost. In addition, the ability to use 5-30 (amsoil) or 5-40 (mobile), both of which make very cold starts MUCH smoother is also a decided advantage for synth.
All my B. S. aside take the free dino oil changes. Assuming you have the time to take the truck in, demand that they change that oil every 3750mi as per the owners manual. It won't hurt the engine and WILL help your pocket book.
i agree with what your saying but when i made that post i was refering to fuel milage, which no one can really say is not true, everything on my truck was stock 12k and i switched to amsoil in everything, and i saw @ 55-60mph a solid 4mpg increase. and yes that is hand calculated. i now see at 70 w/ 4. 10 rear--21 mpg. im happy with the improvement. :-laf