Exhuast fluid

[luvrbus]

BK ot here but happy birthday buddy enjoy your day

good luck

[TomC]

Many of the larger fleets are getting floor mounted 375gal tanks with built in pumps to refill DEF.  When done this way the current cost in bulk is $1.99/gal.  Considering that one gallon of DEF will get about 375 miles with a Detroit and about 240 miles with the Cummins ISX (combination of less fuel mileage and a 3% burn instead of a 2% burn like the DD engines), at basically $2/gal that works out to be .53 cents a mile for Detroit and .83 cents a mile for Cummins.  And with the better fuel mileage with switching from electronic unit injectors to electronic common rail injection (going from 23,000psi to 32,000psi tip pressure), and being able to go from 25% exhaust gas recirculation to 15% (International went from 25% to 40% since they do not use Urea [for the time being]), the trucks and buses are now getting better fuel mileage then ever!  Good Luck, TomC

[Busted Knuckle]

BK ot here but happy birthday buddy enjoy your day

good luck

Thanks Clifford, had a great day! (all drivers waited until it was over to let me know about all the goofy & bad things that happened! LOL)
  BK 

[Busted Knuckle]

Many of the larger fleets are getting floor mounted 375gal tanks with built in pumps to refill DEF.  When done this way the current cost in bulk is $1.99/gal.  Considering that one gallon of DEF will get about 375 miles with a Detroit and about 240 miles with the Cummins ISX (combination of less fuel mileage and a 3% burn instead of a 2% burn like the DD engines), at basically $2/gal that works out to be .53 cents a mile for Detroit and .83 cents a mile for Cummins.  And with the better fuel mileage with switching from electronic unit injectors to electronic common rail injection (going from 23,000psi to 32,000psi tip pressure), and being able to go from 25% exhaust gas recirculation to 15% (International went from 25% to 40% since they do not use Urea [for the time being]), the trucks and buses are now getting better fuel mileage then ever!  Good Luck, TomC

Better FUEL mileage than ever............... But now there is extra expense to calculte into that and it just evens it out or makes it worse!  FWIW
  BK 

[TomC]

BK- I have done numerous total per mile with fuel/DEF costs and the total mile per gallon the trucks are getting WITH the cost of DEF is the lowest in history-period!  And-Detroits DD engines are wiping up.  Cummins ISX is about .25 miles per gallon more, Volvo as much as .5 miles per gallon more.  And while International likes you to think their engines are running efficiently without the use of DEF, with the oil change being twice as many times, regeneration being 4 times as much, their overall running cost is about $23,000 more over a 600k mi time (usual time to pay off a truck).
If I were buying a truck now, I'd spec out a DD15 in the 475hp and 1650lb/ft range and use the new Eaton/Fuller 13 spd Ultra Shift Plus with electronically controlled clutch.  We've found that the driver's that keep their trucks cruising in the 60mph range are getting over 8mpg!  Considering this is with an 80,000lb truck, imagine what your buses would do!  Good Luck, TomC

[Busted Knuckle]

Tom,
In California 60 MPH is a reasonable speed since trucks are targets over 55.

But everywhere else drivers are gonna complain seriously about going so slow!

And yes I'd love to have a sweet set up like that for my buses. But unless they bring the speedlimit back down, I don't see it happening!

(of course ther would always be one bus in the fleet that would still go faster! As Sammy Hagar say's "I can't drive 55!")
  BK