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Frank Lee · 12-26-2014, 10:48 PM

Search "optimal piston speed" for probably the best engine rpm range and for aero, the slower the better. Most American vehicles with automatic transmissions are said to get their optimal mpg at about 45 mph, a little above converter lock-up.

12-26-2014, 10:48 PM	#18 (permalink)
Frank Lee (: Join Date: Jan 2008 Location: up north Posts: 12,762 Blue - '93 Ford Tempo Last 3: 27.29 mpg (US) F150 - '94 Ford F150 XLT 4x4 90 day: 18.5 mpg (US) Sport Coupe - '92 Ford Tempo GL Last 3: 69.62 mpg (US) ShWing! - '82 honda gold wing Interstate 90 day: 33.65 mpg (US) Moon Unit - '98 Mercury Sable LX Wagon 90 day: 21.24 mpg (US) Thanks: 1,585 Thanked 3,556 Times in 2,218 Posts	Search "optimal piston speed" for probably the best engine rpm range and for aero, the slower the better. Most American vehicles with automatic transmissions are said to get their optimal mpg at about 45 mph, a little above converter lock-up. __________________