Dodge dealer did oil & filter change and charged me for 12 quarts. Viper tech said he used 11.5 quarts while my owners manual says it takes 10 quarts with new filter. Adding to the confusion, I believe that the service manual says the car takes 10.5 (or 11?) quarts. As my oil pressure now stays very high (80) even after the car is well warmed up (unless I just lift completely off the accelerator, then it drops back to 40), I'm wondering, do I really have an aeration risk and need to drain out approx 1/2 to 1 quart??? Dipstick (that could be me for going to dealer) reading is on the last "L" of FULL (as opposed to the ideal level being exactly on the line just to the left of the "F" in FULL.) For those that logically just add oil until they hit the correct dipstick level (what a concept), I'm curious how much oil that actually is? Thanks!