Truck camper mileage

When I usually set CC at 60 mph, when I am bored on flatland, I "catch" big semitrailer and drive in its tailwind. That sometimes is reaching 80 mph, but usually I go 70-75 mph and the drag covers for speed mpg penalty.
Meaning I can follow the semi at 75 mph and still burn the same fuel I do, while driving 60 mph alone.
Turbulence is a bit uncomfortable, but that keeps me from sleeping on boring drive.

Grit dog wrote:

jimh425 wrote:

SidecarFlip wrote:
Don't think I've ever run my truck at 80. Way too fast for a sane person

I’m not sure if I’d feel safe at that speed with your truck either, but 80 is just the speed limit in parts of some Western States with minimal exits, minimal traffic, and the biggest concern being wildlife. No, you don’t have to go that speed, but I don’t think every pickup driver I see is insane.

Lol. 80mph??? That's crazy bro!
Fark, if you can't drive 80mph you could have another birthday crossing Montana!

I have crossed the country including Montana numerous times. I doubt I have ever hit 80 mph. When I had 19.5 wheels and tires the speed rating was 70. Tires are a big concern in the heat with a heavy load.

jimh425 wrote:

SidecarFlip wrote:
Don't think I've ever run my truck at 80. Way too fast for a sane person

I’m not sure if I’d feel safe at that speed with your truck either, but 80 is just the speed limit in parts of some Western States with minimal exits, minimal traffic, and the biggest concern being wildlife. No, you don’t have to go that speed, but I don’t think every pickup driver I see is insane.

Lol. 80mph??? That's crazy bro!
Fark, if you can't drive 80mph you could have another birthday crossing Montana!

noteven wrote:
Anyone with a gasohol engine ever compare $/mile using 91 vs 87?

With my V10 I usually see 8-10mpg depending on terrain, I have tried 90 (we don't get 91 up here) in my truck with a 5-star tune and noticed no MPG difference.

noteven wrote:
Anyone with a gasohol engine ever compare $/mile using 91 vs 87?

In my opinion,they just got a little better each year..As mentioned above,the 70's vintage big blocks were horrible for mileage yet the ones I've had in the 90's do pretty good if you keep your foot out of it....My old '76/454 in my last rig didn't ever see 10 mpg empty or loaded...

They came along ways in mileage in the late 80's and early 90's compared

Anyone with a gasohol engine ever compare $/mile using 91 vs 87?

11-13, but who cares? You gonna sell your truck and camper because you get 11 instead of 13?
I'll drive near 80 empty. Plenty of 75mph speed limits in Texas.
With the camper, I keep it under 70, most of the time.

5000lb camper, CC set at 60 mph gives me 12-13 on highway cruising with my Ford diesel dually.
But any high wind can cut it by 10% easy.

Just for comparing old vs new truck technology .
My 454/460 GM and Ford DRWs in the '70s got 4-6 mpg carrying a 10' 6" truck camper at 55 mph (national speed limit). Hell those old gazz hoggs got 8-10 mpg just sittin' or running empty.

I honk my horn at 10mpg, diesel.