Good mileage trip

[towtruckerfour]

We took the blue 70 and went from Mountain Home to my wife's dads house in Twin Falls. Its roughly about 90 miles one way. We only used 1/2 a tank running at 75mph. After figuring it out, I think I averaged about 12 mpg. Not too bad for a 390 with a c6. I love the sound of dual turbo mufflers and headers on the freeway.

[cowbay]

If you really want to help you mileage on the cheap. Get a vacuum guage just through that I have picked up 1 1/2-2 miles a gallon

[MaxKlinger]

Troy, what rear end ratio do you have in your truck?

With a 360, T18, and a 3.50 open 9" rear, my truck got, on one really nice Sunday evening in September, 19mpg! But I was cruising at a steady 55mph. I've never had my truck over 65 as long as I've owned it!

[towtruckerfour]

I'm not sure what ratio it is. My dad changed it years ago. I know when the speedo is at 90 I am doing 75 if that helps. It cruises great at 75 even 80.

[Jarred Hodges]

I have a 390 c6 in my f100 and went on a 120 mile round trip. Going I had an oxygen bottle propane bottle and cutting torch stuff. I was grossing around 4700lbs with a passenger. I picked up a 460 c6 combo and hauled it back. I figured the mileage and it was around 12. I thought that was pretty good for an overloaded pickup