GMs 5.7 5.3 pretty efficient-21.3 mpg 98 Suburban 3000 mile trip-70 miles per hour

GM deserves some credit.I just returned from a 3000 mile trip-NOLA-Flagstaff-NOLA in a 202,300 mile 1998 Suburban 2wd.It delivered 21.3 mpg at 70 mpg CC on the whole time-45 psi well worn tires,Mobil I 5⺚. It has the older, less efficient 5.7 liter motor.The 5.3 is more efficient.I had no idea that an ancient Suburban could get 21.3 mpg at 70 miles per hour.It is rated 12/17-current ones are rated 14/20.
In pure city driving it gets 14 mpg with hypermiling lite techniques.It could get 17 mpg if I shut off at redlights.
The Volt will save GM, but their 1/2 ton vehicles are very good.They will sell in much lower volumes, but they will still be needed-work/fleet/farmers/contractors/cops/gov etc.Folks ought to "car share" them like they do with some cars.

Charlie
PS I have a Prius also.It would have gotten about 45 mpg same speed, but with a much smaller load-no mattress of pillows,or 2 ice chests,MTB,tools etc.

Original post by phoebeisis

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