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07DuramaxHD 01-12-2008, 02:31 PM I don't have my owner's manual right here with me and I'm going in a little bit to go fill up and add my Opti-Lube XPD to the tank of fuel and I had a question...how big is the tank on my 07.5LMM ext. cab short bed and how much are you guys that are running opti-lube adding per gallon of fuel? The paperwork I received with it says 1/4 to 1/2 oz. to each gallon...what do you guys think??? 8100 Power 01-12-2008, 02:37 PM Tanks are 26 Gallons IIRC.. Unless they changed it for the NBS trucks. Ted White 01-12-2008, 02:46 PM Read the extensive report on fuel additives in the fluids section of this forum and stop wasting your money. 07DuramaxHD 01-12-2008, 02:47 PM Read the extensive report on fuel additives in the fluids section of this forum and stop wasting your money. Opti-Lube was rated #2 right? Do you not think it's necessary or something? bluewater 23t 01-12-2008, 06:37 PM Tanks are 26 Gallons IIRC.. Unless they changed it for the NBS trucks. nope, NBS is still 26 gal for shortbed SPY169 01-12-2008, 08:19 PM I read the report and my take was that ULSD was in need of a little love compared to LSD diesel and in turn I as well have been using Optilube xpd, why do you not thinks its needed? did you come to different conclusion then I did after reading the report, only curious as I could have easily overlooked some good posts, Josh | ||