A New Best Milage with the BabyMax

[Forzfed]

I ordered a catch can for my 2.8 Duramax.  I decided to go to Grand Forks do a little shopping and pick up my catch can at the border.  From the house to the Border I managed a 5.9L/100km, but there was almost 30 km of construction so I was a little under the speed limit.  When I left the border it was sitting at 38.87 usmpg.  I was doing 70-72mph on the freeway and held a consistent 35.9 usmpg 90% of the way.  As I pulled into Grand Forks it was sitting at 36.0 on the money.  Driving around brought it down to 34 usmpg.  When I left GF I was doing 75-80 mph and my milage was starting to dip so I decided to hold steady at around 66-68mph.  That got me back up to a little over 36 mpg.  From the border to home I got a best of 5.5L/100km or 42.76 usmpg.  Again, the construction really helped getting that.

Round trip 452.9 km and total average of 6.5L/100 or 281 miles 36.187 usmpg.  I always have to rub it in to my Boss whom is so liberal he would probably marry his bicycle if he could.  He used to give me a hard time about my diesel truck.  Which will no doubt destroy his Toyota Camary in the milage department!

What do you guys think?  Pretty damn good for a 5000lb Truck!

[nocooler]

That's pretty damn good. Better than our CRV got this weekend, I think we averaged 34mpg.
How does it tow?

[Forzfed]

That's pretty damn good. Better than our CRV got this weekend, I think we averaged 34mpg.
How does it tow?

Bone stock I find it could use a little more HP.  But with all the low end torque it has no problems pulling away.  I had close to 8000 lbs including the dump trailer and it took a bit to get up to speed.  Still wasn't broken in, since then the computer has upped the redline from 3400-3800rpm.  And I installed a CAI, bigger exhaust and a 4 pos chip to give me an extra 45hp, and a throttle commander.

[Steve Wood]

That surprised me.  That is really good!

[phil_long]

Yeah that's incredible fuel economy!!!!

[Steve Wood]

I only get 26 mpg out of my Miata

[Forzfed]

Yeah I've had to pick me jaw off the ground a few times seeing the milage this truck gets.  I was in Fargo in May and I had just got on to the freeway but in city limits the speed is only 55mph.  I was doing that and reset my milage.  I looked down and it was at 44 and I'm like WTF why is it getting such horrible milage!  I let up a bit on the throttle and it went to 45.  I was thinking it was L/100 not realizing it was reading 45 USmpg.  That only lasted for 5 miles because after that I was doing over 70mph.  If you keep the speed down it will get unbelievable milage.  With a 40mph tail find I seen 50 usmpg for 20 miles, I couldn't stop shaking my head in disbelief. 

I was washing my truck one time and a guy in a Mazda CX-5 said he liked my truck but then said it must be really bad on gas.  I told him it doesn't burn gas.  I think he would be totally floored to find out that my truck would destroy his CX-5 in the milage department!

I'd still like to put a little bit bigger turbo on it.  One that adds an extra 30 hp, nothing too crazy.

[Steve Wood]

It's hard to believe but I'm glad that it is working so well for you.

[TexasT]

My cousin has a diesel rabbit(old I know) that gets 50mpg according to him. My Cummins only does about 15-16mpg but it is a 6.7L

[Forzfed]

I was in Alberta last long weekend and diesel was way cheaper there.  So, I filled it to the brim.  I could see it on the first bend of the filler neck.  I set the cruise at 70mph and I had to laugh when I pulled into Saskatoon because my fuel gauge was still on full.  My milage indicated 6.2 but when I filled it to the same point I got over 46 mpg imperial or 37 usmpg.