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Welcome to EM, Brad. You're going to get your best mpg down at 2000-2200 rpm, where your Brake Specific Fuel Consumption map gives peak fuel economy v. power. For your gearing, 2285 rpm = 50 mph. That's pretty convenient in terms of aerodynamic drag, too, as you're below the major drag hit that comes above 55 mph. Unfortunately, 50 mph is a bit slow for freeways, but you might try finding some country roads with 55 mph PSLs, and see what your Focus can really do.
My wife had an AT Focus that got 26 mpg at 72 mph. It got 36 mpg at 55-60 mph. Slow down for a tank, and you'll see 35 mpg.
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Darrell
Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
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