Originally Posted By: RdcdI
The cheapest is Amaoil! It's also the best! Amsoil Signature series can go 25,000 mi in normal driving conditions with a quality synthetic rated filter, ie, Amsoil, Napa Platnium, Wix, etc. Do consider the excellent wear you will receive using the best oil available. Do the math? and consider your time and energy every time you change the oil. I am not a Amsoil affiliate! Just a believer by using this oil. It's the only true Full Synthtic oil period! Just try it and see for yourself. It ends up being less money for thes best protection. Find any other oil that can make this 25k mi claim? You can't! Because their not true synthetic oils!
Ahem, I would never run an out of the box off the shelf wix more than 10K, much less 25K, same with the NAPA Plat, which NAPA here SELLS Amsoil and even they say they wouldnt push the Plat pass 15K
I wouldnt all of a sudden go from 3K oci to 25K either, its hard enough to get people to go from 3K to 5K...
Stick with an off the shelf syn unless you really wanna go with Amsoil.
PP and a P1, or what not for 7.5k-10k
QSUD and a Bosch Premium for 7.5K-10K
M1 and a M1 Filter or K&N for 7.5-10K