Pretty Stoked!

J-man67 · June 28, 2008

I usually dont pay attn to my mileage but I was surprised when I saw what I was getting via DIC. I filled up in Dover which is 45 miles south of my house, got on the highway and this is what I got. My girlfriend (left hand HAHA) took the picture with my cell while i was getting off at an exit. Wasn't expecting to see better then the sticker on the truck said. I was doing a stready 66 mph with a/c on and it was flat but I am still happy to see these numbers.

99silverado1500 · June 28, 2008

Yeah thats downhill averages!!!! My dads duramax got 87MPG rolling downhill for 25 miles straight, but as soon as the road had a up grade it dropped back down to 18-19 like usual.

J-man67 · June 28, 2008

Yeah I have seen 99mpg going downhill, but that wasn't downhill. It was highway driving and its all flat. I only got 18-20 with my ext cab Colorado on that same drive so thats why I was surprised and happy.

99silverado1500 · June 28, 2008

Yeah, do you have a 4.8 or a 5.3? At my local dealer they have a leftover 2007 Silverado Crew Cab LS 4x4 for 21,700 on special and I wanted to buy it but it has a 4.8 and 3.42s and I dont know how well its going to do on fuel and how well it might haul something (3000-5000 lbs), as my 5.3 has its tongue hanging out on some hills loaded but its to be expected with a gas engine.

hodo78 · June 28, 2008

I usually dont pay attn to my mileage but I was surprised when I saw what I was getting via DIC. I filled up in Dover which is 45 miles south of my house, got on the highway and this is what I got. My girlfriend (left hand) took the picture with my cell while i was getting off at an exit. Wasn't expecting to see better then the sticker on the truck said. I was doing a stready 66 mph with a/c on and it was flat but I am still happy to see these numbers.

J-man,

I live in the flat lands. If I get on the interstate and set my cruise at 65mph with air on, I can consecutively get 20.5 - 21.0 mpg over a 100 mile cruise to my inlaws place. All interstate of course, and no I am not drafting to get this mpg. For reference, I have the 5.3 liter.

So it is possible with certain characteristics: flat road, no wind, and some luck

For reference, if I increase my cruise speed to 70mph with air on, my mpg drops to 18.3mpg on the same route. At 75mpg I will drop down into the high 17's.

J-man67 · June 28, 2008

Yeah, do you have a 4.8 or a 5.3? At my local dealer they have a leftover 2007 Silverado Crew Cab LS 4x4 for 21,700 on special and I wanted to buy it but it has a 4.8 and 3.42s and I dont know how well its going to do on fuel and how well it might haul something (3000-5000 lbs), as my 5.3 has its tongue hanging out on some hills loaded but its to be expected with a gas engine.

I have the 5.3 with 3.73 gears. I don't tow anything too heavy so I am happy with how it performs. A guy on another site has the 4.8 with 3.42's in a 07 Silverado. He just put on Fabtech's 8 inch lift and 37's. He said it handled them fine. He is switching to 4.88's but just throwing that out there. I actually think the 5.3 gets better mileage then the 4.8, at least thats the idea I get from viewing this site.

J-man67 · June 28, 2008

I usually dont pay attn to my mileage but I was surprised when I saw what I was getting via DIC. I filled up in Dover which is 45 miles south of my house, got on the highway and this is what I got. My girlfriend (left hand HAHA) took the picture with my cell while i was getting off at an exit. Wasn't expecting to see better then the sticker on the truck said. I was doing a stready 66 mph with a/c on and it was flat but I am still happy to see these numbers.

J-man,

I live in the flat lands. If I get on the interstate and set my cruise at 65mph with air on, I can consecutively get 20.5 - 21.0 mpg over a 100 mile cruise to my inlaws place. All interstate of course, and no I am not drafting to get this mpg. For reference, I have the 5.3 liter.

So it is possible with certain characteristics: flat road, no wind, and some luck

For reference, if I increase my cruise speed to 70mph with air on, my mpg drops to 18.3mpg on the same route. At 75mpg I will drop down into the high 17's.

Yeah, Delaware is pretty flat as well. I wasnt drafting either haha, i was the slowest vehicle on the road so people were passing me and leaving me behind...oh well. I usually don't drive like that but was curious what it would get with easy driving and I liked it.