Originally Posted By: 92saturnsl2
The AC Delco "Dexos1" oil is the same as Mobil's "Super" Synthetic.
When GF-5 was introduced, the old Mobil Drive 7500 was dropped and became "Super Synthetic" in order for Mobil to align their products better with the competition, since nearly all of them are offering two tiers of synthetics.
That said, it is not unusual to find Super Synthetic (around here at least) at around $4 a quart. Therefore there's not tons of money saved by doing it yourself ($10?), but 15 minutes in my driveway, some change in my pocket, and the piece of mind in knowing that it is done RIGHT is a LOT better use of my time than the hassle of taking my vehicle to the dealer.
The real value comes with getting a *much* better oil for the same $40. Mobil1, Pennzoil Ultra, Castrol Edge and the like will promote longer change intervals and offer better protection.
I hear ya on the peace of mind. I wouldnt save no 10$ though. Say I coyld get penzzoil platinum 5 qt jug for $25 at Wally world, then $6 for an additional qt. Then 6$ for a filter. Savings in $ would be m inimal but I would be getting better oil. I dont think penz. Ultra is on the dexos list though.