Join Date: Mar 2010
Location: Pittsburgh, Pistolvania
The top filters for the Cobalt are either ACDelco (NOT the Walmart ones...), Hengst (They're the ACDelco's), Wix, or Napa Gold.
Anyways, as far as extended interval oil changes, the trick to that is to change the oil filter about halfway through and then top off the oil if necessary. A good synthetic can last a long interval just fine, but the filter won't. I wouldn't advise doing extended intervals on standard non-synth oil.
GM Stage II | 2nd Gen Projectors | 5000K Low Beams | 3000K HID Fogs | LED Tails| SS/TC Seats
▲RIP 2007 G5: Totalled 1/26/10▲