I'm the owner of an 04 LS V-6 that had 32K when I bought it & now has 73K on it, I'm wanting to know if anybody else is getting 405-415mpg per tank, I think this is pretty good. Also, on my recent visit for an oil change, the guy in the pit said the differential fluid needed to be changed, he showed me & it was solid black, he said it would be ok if he just "topped it off" & I could have it changed when I come back the next time because I didn't want to drop $110 for him to do that at that moment. I don't think it's ever been changed, but he suggests that it has to be done every 65K miles, is this true? Also, I'm sure this has been researched, but recently I filled up at a gas station that I don't normally use with 93, but I still had a 1/4 tank left of 93 from my regular gas station, & for the past few days, when I accel around 60-80, the car does 2-3 quick jerks & then it pans out fine. My first thought was the coils, but then again I was thinking that it's a mix of good & bad gas seeing as though it didn't happen until I used that other gas station. I'm thinking maybe I should run the tank down to half to make sure the other gas is out before I jump to any conclusions. Any advice on what might be causing this jerking?
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