Today I was driving and I was thinking I wonder what kind of MPG the TLs get on the highway. I was wondering if anyone knew the difference between 65 MPH (the speed limit) and 75-80 MPH (speed im normally at) or 85-90 MPH(speed im at if im really late). I was wondering if anyone really knew the differnece in MPG between the speeds and I also use premium which here is 93 they dont offer a 91.

 

i drove 850 miles from houston to atlanta. one thing i noticed is that our cars get optimal mpg at 70 mpg.

 

65-75mph you get top fuel economy in our cars. use 93 octane if you can.

 

Do a search...topic been discussed numerous times.