Wix XP (also called Napa Platinum)
Mobil 1
Fram Ultra
Bosch Distance Plus
Purolator Synthetic
Real European-made Mann and Mahle filters
Mahle has started to outsource many of their filters to Mexico, and these are low-quality junk. Nowhere near as good as the real Austrian Mahle oil filters.
Mann part numbers starting with HU or W are good, they are the real deal, usually made in Germany, but sometimes Spain or Mexico. The HU-series is their catridge filters; the W-series is their spin-on cans, usually painted black.
Avoid the Mann filters whose part numbers start with ML. These are reboxed Purolator Classics, both in cartridge and spin-on form; the ML cans are usually painted white. Almost all of them seem to be US-made.
Mann makes both types of cartridge for the Ecotec:
ML1015 (reboxed L15436)
HU 6007x (real Mann, made in Spain)
Also, K&N used to be very good, but unfortunately has since outsourced to a cheap Korean company making them cheaply in Mexico and Korea, but without passing on the savings.