I'm looking to upgrade the atf in my wife's 01 Lumina (car). The trans oil has been changed regularly for all of its 160,000 miles. The car runs and drives like new, and I want to keep it that way for a few more years. I'm thinking of shelling out big bucks for a synthetic atf, and I've narrowed my choices down to these two:
Mobil 1 synthetic atf- it's $6 a quart, available at walmart and most auto parts stores, and meets the mercon V spec- so it's probably a bit thicker than Dexron VI. (I'm one of those recalcitrant old farts who still believes that thicker oil is generally better.)
Or, Dexron VI: Same price- $6 a quart. Available only at GM dealers, but soon may be available in a Penzoil bottle. It's a bit thinner than the old Dexron III that the transmission was designed for, but not THAT much thinner... and what the #@$%!- maybe it'd get me an extra .2 mpg.
Not looking for suggestions on other brands (amsoil, redline, ect. are too much trouble). Any advice on the pros/cons of Mobil 1 vs. any incarnation (GM or Penzoil) of Dexron VI?
Mobil 1 synthetic atf- it's $6 a quart, available at walmart and most auto parts stores, and meets the mercon V spec- so it's probably a bit thicker than Dexron VI. (I'm one of those recalcitrant old farts who still believes that thicker oil is generally better.)
Or, Dexron VI: Same price- $6 a quart. Available only at GM dealers, but soon may be available in a Penzoil bottle. It's a bit thinner than the old Dexron III that the transmission was designed for, but not THAT much thinner... and what the #@$%!- maybe it'd get me an extra .2 mpg.
Not looking for suggestions on other brands (amsoil, redline, ect. are too much trouble). Any advice on the pros/cons of Mobil 1 vs. any incarnation (GM or Penzoil) of Dexron VI?