Finding Durablend is the hard part, getting it at a decent price is a win IMO. That comes out to $16.50 for 5 quarts, comparable to Dexos blends in jugs at Wally's. And you won't find Durablend at any Wally's around here anyway.
2004 Jeep Grand 4.0 @ 133k Pennzoil HM 10w30 w/ 1 qt 10w40
KIA Sedona 62k, Ford Focus 116k, Chrysler Sebring 186k, Chrysler Concorde 120k