Does anyone know what the difference in mpg is betwween 8.1 liter long bed and short bed, if any? i currently own a 2003 8.1 liter long bed. been looking around for a new truck and considering short bed.

 

I don't think you'll see any improvement in fuel economy, but you'll definitely see an improvement when trying to park!

 

If you're looking at a heavy duty truck, I don't think they come in short bed. They only make the long and regular beds. You have to go to a 1500 to get the short bed. I had a HD regular bed and now have the short bed. For my money, I'll take the short for my purposes. They weigh less so they would have to get a little better mpg and parking is definitely easier. Good luck.

 

Actually you can get them in long or short bed. I had a 2500HD extra cab short bed with the 8.1/Allison combo and wish I never sold it. That was one fun truck to drive - it would haul butt or whatever I put behind it. I've never seen a short bed regular cab with an 8.1 though. To answer the original question: I agree with Kevin - I don't think there will be any difference in mileage.