I have an 06 focus as a long term rental car. Ive put well over a thousand miles on it, and logged fuel economy as well.
I drove a late moel civic from delaware to pittsburgh and back a while back... it was brand new.
I have driven a late model corolla a few times as of late, but not for lots of miles.
Which is the best? actually, the focus! Actually the nissan sentra rental I had once was the best, but I only had it 2 days and maybe 100 miles.
The focus has only given 30-32 mpg in all highway driving. However the civic only gave 32-33 in our use of it... terribly poor for both... but the focus, as much as its trans has to kick down, never groans or downshifted as much as the civic. The civics engine may be lnglasting, but its drivetrain is inferior to most every vehicle Ive ever driven... and a co-worker who bought a late model pre owned civic is complaining and worrying about his civic's shift quality.
The focus actually felt less grounded and willing to handle than the civic or sentra. I hadnt taken the corolla around any interstate offramps or windy highways, so I cant comment. I was disapointed, gien the expensive relatively low profile tires on the focus. I think the high side and overall profile of the focus (good for a tall guy like me, at 6'4, who immediately had a comfortable excellent seating position without touching my head on the roof!) makes it a bit more succeptible to tip and wind, and thus less apt at handling... despite the speed rated tires and all of ford's claims.
I think the sentra, with a 0.2L smaller engine than the focus, had more pep than either, and gave me calculated 35.2MPG for the bit that I used it in mixed driving!
All car makers need to get smarter on real fuel economy from their economy cars. Stop catering to the schmuck idiots and women who convince themselves that their econobox is in some way 'sporty'... and make an economical car.
The focus actually has nice materials, evenif to the touch they are hard plastic... Id never have guessed... and hard plastic doesnt offgas or crack as easily, so its actually superior, regardless of how much people want soft touch 'luxury' dashboards to feel 'upscale'.
Id love to give the cobalt a try... if the ecotec in there is anything like the 2.0 saab designed engine that I have in 2004 9-3 2.0t (which shares the block)... the engine will be quite economical and good all around. the cobalt looks good from the outside, but the interior, when I checked it out at the dealer when it first hit the dealers, is inferior to the focus in materia selection... though not as bad as the cavalier.
All in all, I have to say Im impressed by the ford focus... ford has done a good job on the refresh... now they need to put a diesel in it!
JMH