what can you do to an 8.1 to improve gas mileage?

an intake, exhaust, and headers will help a little.

thanks what kind of racin do you do?

circle track

what can you do to an 8.1 to improve gas mileage?

Slow down or Park it!

DEWFPO

Slow down or Park it!

DEWFPO
Took my thoughts exactly. MPG will improve by slowing down- slight improvement when empty, larger improvement if towing.
And parking it unless needed works for me- leased a Chev Malibu for less than I was spending to use the 8.1 as a daily driver-a lot less!!

John

Didn't you know that "8.1" is the mpg you should expect? :D

what can you do to an 8.1 to improve gas mileage?


Trade it for a dmax):h :joke: ,


-Rob-

What kind of mileage are people getting? I reallywan tot know becasue I am thinking of trading my D-max.

To be quite honest, unless you drive a ****load of miles, I don't think the D-max is the way to go. It's $6000 less for an 8.1 with an Allison vs. the D-max, gas is .30 cheaper and Diesel is going up this summer due to low sulfer fuel. Twoing with a D-max is 12 at best with a light load and less as you add weight. Maint. is twice as much as well.

I have never seen better than 10 in town. Towing my 11,500K 5th wheel I get around 6-7.

I have never seen better than 10 in town. Towing my 11,500K 5th wheel I get around 6-7.

Me, too. That's why I got the Duramax...(I traded my '03 8.1-Gasser) I went on a 12,000 mile trip (Around the U.S.) this past Summer, with our 33-ft., 10,000-lb. (Frame-Hitch) Travel-Trailer. The "Best" mileage I got (with the 8.1) was (at 60-MPH), Freeway, Flat-Road, 6.2 MPG...-:t

The "Best" mileage I got (No Trailer) was 11.4 MPG -:t

My LBZ gets 16-MPG in the city and 21-MPG on the freeway. (No Trailer) "All" MPG was hand-calculated.

This summer we head out again... :exactly:

I'll post again after that trip...

I'm "Very" happy with my Diesel...):h

What kind of mileage are people getting? I reallywan tot know becasue I am thinking of trading my D-max.

To be quite honest, unless you drive a ****load of miles, I don't think the D-max is the way to go. It's $6000 less for an 8.1 with an Allison vs. the D-max, gas is .30 cheaper and Diesel is going up this summer due to low sulfer fuel. Twoing with a D-max is 12 at best with a light load and less as you add weight. Maint. is twice as much as well.

'tis all true; hence my sig. I will however, try a walk on the other side one say, just to say I've been there...

what can you do to an 8.1 to improve gas mileage?
What size is the engine and what rear gear ratio do you have:confused:

What size is the engine and what rear gear ratio do you have:confused:

He says right there he has the 8.1!

He says right there he has the 8.1!
Duh my mistake :D I wasn't thinking I thought he was getting 8 mpg , need sleep :lol:

I'm sure he is getting 8 mpg. After all that's what 8.1 means!

I'm sure he is getting 8 mpg. After all that's what 8.1 means!
Your probably right I had a 6.0L 410 rear HD and it got around 10 to 11 mpg:D

Just got back from a 1500 mile trip towing my 33ft 10,000lb 5th wheel. I got in the high 8s in the rolling hills of VA and NC. Once I got out on the flat interstate I was getting 9.5 and as high as 9.8 towing at 70mph. I have 3.73 gears which may have helped in the flat conditions. I have never gotten below 8 towing.

Just got done plowing a big storm. Averaged. 6.1 mpg! :ro)

I changed the tranny fluid, diff and engine fluids to synthetic along with a new air filter. 19k on the engine, the truck is getting 11mpg mixed and 13 freeway. 2004 CC/8.1 4x4 with 4.10 axle.

My CC D/A 4x4 gets me a visit to the shop for overheating, as you can tell not happy with the "upgrade".