My son and I did a 47 mile ride today from Black Canyon City, AZ to Cleator, AZ and back. The first part was old mining roads and lots of rocky river bottom with a lot of steep ups and downs, we had an average speed of about 10 mph. Total miles to Cleator was 26. On the way back we were on a dirt county roads with an average speed of 35 mph and only 19 miles back. The Grizzly used 2.068 gallons and got 22.72 MPG with a range of 120.41 miles per tank (5.3 gal) The XP 850 used 2.942 gallons and got 15.97 MPG (the best I've got so far) with a range of 71.86 miles per tank (4.5 gal). We raced a few times from zero to about 50 mph and were dead even to about 45 when the XP 850 would start to pull away. The ride of the XP 850 blows away the Grizzly 700, I rode the XP 850 for about 40 miles of the ride than switched to the Grizzly so my son could try the XP 850 out and he wouldn't give it back. Like I've said before if the XP 850 had a wet clutch, ball joints with tapered shafts and nuts and Grizzly style 4X4 system and brakes it would be hard to beat. I still say over all the Grizzly is a better Quad. TOM