I got over 20 MPG while trying to maintain 58 mph. Love the little V8 4.8L. Power when you need it, soft and relaxing when your regular driving needs are there. If I push the van to 70 mph, then my economy is 16 - 17. BUT, using my Blue Tooth Engine checking device, I found 58mph is the sweet spot for just over 20mpg. I can handle that. V8 towing power, travel economy, and looks. I like it!
The van is really an Express RV-base model upgraded with a Starcraft low-top conversion. Great vehicle. Starcraft conversion approach much better than going with the conventional Chevy passenger van. Owned a couple of Ford vans previously, no comparsion, Chevy much superior, particulalry with respect to control and handling. Gas mileage great too after about a 5K mile break in period. Driving about 85% highway and 15% city we're getting a little over 19.5 mpg. Estimate the actual city/highway mileage breakdown would be 16/20. Not bad for 5300 lb full-sized van.
We've owned this van and are still driving it, first in a cleaning use for my company where we cleaned new construction homes, and now for special functions at church ,school etc. I enjoy driving the van and being able to help so many people with various needs. It has a lot of room and functionality to offer for large families or groups for serious travel or for fun trips. I would highly reccomend this van to any one who is in need for such a vehicle.