With your Suburban, 13 combined MPG * 42-gallon tank = 546 miles.
Yes, you can go far, but you aren't achieving anything close to good fuel economy...
Fuel Economy is in the eye of the beholder. My wife was rearended twice. The first time we were in my Aunts Delta 88 at a stop light in Huntington Beach CA when a Suburban rear ended us totaling the auto and severly hurting my wife who was in the back seat. The second time was when a Washington State DOT truck was not paying attention to traffic and rear ended my wife in our Ford Escort we had for her driving required merchandising job and again got severly injured.
What Price do you put on quality of life over gas milage?
For me, that was the end to me having family members drive small auto's. The suburban had barely a dent to it's front metal bumper and the DOT truck according to pictures taken by WSP in their police report showed nothing but scratches to the DOT truck and yes our 2 year old escort was totaled.
My wife and I would rather fill up a tank and have protective steel around us than deal with the body damage caused by other poor drivers.
So from my point of view, Gas milage is all relative in relation to QUALITY OF LIFE!
My wife loves the suburban for the room, comfort and the line of sight due to sitting up much higher as our suburban has a 3" lift kit. For us, we will never get rid of our full Size SUV's. Yes I know I spend far more on gas each month than the average person, about $600 a month, but it is well worth it.
Buy an S60 and she'd likely be better off in both regards. (active headrests for rear end collisions)
S60 would be considered if it was built and run by an american company and if the wife liked the looks of volvo's. We have all GM auto's.
In both accidents, the seats were totally broken from the connections in the floor as to how hard the hits were, even with Active headrests I still think she would have gotten some form of wiplash. The first car did not have headrest as to why I think it was so bad and the 2nd car had them and lucky for her she was resting on it so she only agrivated her old injury rather than causing new damage.