Hi y'all. I've only been on here a few days, and I'm loving the forum. After reading countless threads about many different issues, I'm beginning to think I'm not getting the mpg I should be getting with 2 of my 3 suburbans. The info is in my signature, but I'll give more detail here: #1 1995, 350 TBI, K1500, 265/70-16 Tires, 140,000 miles It has great jump torque off the line and runs great after 2500RPM, but VERY sluggish between 1500-2500RPM. Only had it a few months, haven't checked anything on it yet....just realized I'm only getting 11-12, even on the highway. I added a tornado and K&N filter, but no help. Another note, heat gauge never gets anywhere near 210 unless I'm pulling a trailer. I'm thinking possibly someone put in a HighPerf chip and low-temp stat? Or maybe therm went out and they just didn't replace it at all? Your thoughts????? #2 1989, 350 TBI, C1500, 31x10.5-15 Tires, 200+K miles This truck runs GREAT, but I can't seem to get over 13, even on the highway. I've had it about a year and a half, and it seems everyone else here is getting better mileage out of similar truck. So.....either 90% of you guys are lying about your gas mileage:gaspr my trucks need help. Thanks in advance!!!!