00 Passat V-6 vs. 98 Oldsmobile 3.8l V-6

My future wife is going to school in Kansas City (around 240 miles) once a week for classes. I drive a 00 Passat with just under 100k and she has a 98 Intrigue with around 118k. Which would be more reliable and/or which would be the lowest cost per mile? The Passat is mine, and I would like to keep the mileage low, but I don’t want the Oldsmobile crapping out on her either.

My 30v V-6 is a 5spd and is just a great car. Hers has the 3.8 Liter V-6 that has made GM famous. they both get around the same mpg.

Ideas, suggestions?

DUPLICATE QUESTION