what is the best oil and fuel filters to use. i have been using wix for 5 years, they supposedly make the fleetgaurds??? and the cummins dealer acts totally annoyed when i go and ask about anything for a dodge truck, i don't know how much they make but they aren't worth a crap in peru illinois. anyhow, after reading that last issue i would like to switch from rotella to premium blue but don't know where to get it for a good price. sorry for asking but the search engine does not work for me no matter what i try. i don't understand why and i am totally frustrated with it, it seems about worthless and it used to be such a good tool. thanks much