[jayliu1984]

I recently did a 600 mile round trip from Vancouver Canada, to Portland Oregon in my 2009 I4 Accord.

To make the solo trip less boring, I decided to try to get the best mileage possible, which of course include drafting big tour bus and semi.

Oh my do Americans drive fast... Those semis.... all going 65+, and all other cars must be doing 75-80.

USA is sure a nation on wheels, it is so freaking busy that I end up getting stuck in traffic half the time doing 20-40.

Needless to say, my plan to minimize fuel comsumption is a wash. But nevertheless, the car did pretty well with 42MPG over the 600 mile trip (EPA is 27MPG).

I find that going at 65mph, drafting a semi will net 10-15% fuel save (1 semi length in between, I felt pretty safe).

Going lower than 55mph, there is virtually no difference.

And the best strech of highway I had, is the section within Canada on a flat, newly paved empty highway and I was tired so I was doing 52mph, and the car managed 55MPG.

Why can't we all drive at 55mph? I am starting to like the highway in Canada where the speed limits are usually 56-65MPH, so I never felt pressured going at 56.