Oil filter Wix or AC DELCO

I use Valvoline NextGen high mileage synthetic blend 5w30 in my 1998 Tahoe w/ 161k miles. I usually use ACDelco or Wix filters. Depending on how much highway/city driving I do I change between 3k-6k (manual says 3k for city, 7k for highway) and five quarts go in, five quarts always come out :D. I used Valvoline full synthetic high mileage for about three changes in a row, but decided it probably wasn't worth the cost on such a high mileage, non performance engine. Plus, I wanted to use the NextGen when it came out. So far, I'm impressed with the recycled oil.

wix filters , and shell rottela 15w-40 still a new motor with just 1500+ miles so soon i will go to syn

Clean Throttle Body, Clean MAF, Change air-filter if needed (manual recommends every two years unless you live in a dusty environment), change fuel filter ( depending on mileage or time. I do mine every two or three years, if it has never been done, do it). Run a good injector cleaner through (Chevron Techron if you can find it)the fuel system, then run another tank of gas through, and then do an oil change with synthetic oil and a good quality oil filter (Wix are good (napa) or any of the OE/OEM German filters like mann, mahle or bosch.).

My local NAPA always has my oil filter in stock. It's a good quality WIX filter.