Which car is the most reliable?

Especially, for long back and forth work commutes? And why?

A. Pontiac Vibe 2005-2009
B. Honda Accord 2004-2009
C. Hyundai Elantra 2007-2010
D. Hyundai Sonata 2007 - 2011
E. Mazda 3

Toyota Corolla best car for gas.

Pontiac Vibe is based on the Toyota Corolla so it should be pretty good.

None of the others are lemons either.

The Accord and Sonata are slightly bigger vehicles and will probably use more gas.
The Elantra and Mazda 3 are more comparable to the Vibe.

BUT, for reliability, it's going to come down to the individual vehicle. A well maintained low mileage Mazda is going to last you longer than had high mileage abused Vibe.

A car is only as good as its previous owner. Did the previous owner treat it with care? How does the interior look? Any significant exterior damage? Any used car you're thinking of buying should be given a once-over by some certified mechanic that you trust, before you close any deals.

Of the cars you're interested in, I'd say the Honda Accord and Pontiac Vibe would be the most reliable, if you are looking, as you say, for a trustworthy commuter car. (The Pontiac Vibe is basically a re-branded Toyota Matrix, and, as long as you treat it right, it will serve you for years. My mom had one she passed down to my sister… A 2006 with 178,000 miles on it, and still going strong!)

If it was me, I'd stay away from the Elantra. Hyundai HAS come a long way since their beginnings, but older Hyundai's (2003 and older) are to be avoided. If you are seriously interested in the Elantra, I would recommend you go for the newest model year you can afford.

Mazdas are sporty, and cool - I have nothing bad to say about them! Again, it all comes down to the individual car's condition. Check the car out, thoroughly, and beware of anything that seems potentially fishy. Older Accords (90's to early 2000's) are likely to be the ones driven exceptionally hard, but if you stick with a newer model year, you shouldn't run into this problem as much.

Just be smart about it, use common sense, and get as many of your questions answered as possible.

Mazda 3… Consumer reports.

Honda, with cash.

I would go with either the Pontiac Vibe or the Hyundai Elantra. The vibes are reliable but sluggish when equipped with an automatic, and Hyundai Elantras are way more reliable then they used to be and offer great value compared to the others.