isx 400 fuel mileage

[aquitted]

Looking at buying a 05 volvo class 8 D unit with 24ft box 2 rear axles engine is a cummins ISX 400 with a 10 speed Fuller manual tranny. Does anyone know what kind of fuel mileage i could get with that?

 

[mrgoodtude]

AQ we drove an 05 780 with a different set up (500 ISX with 12speed Arvin Meritor and twin 3:42 rears) avg best 12.1 @ 61mph.
Your Eaton won't skip shift ergo you will cycle every gear and consequently use more fuel so my best guess would be 9.5 as an avg if you drive conservatively (assuming you have the 3:55 ratio).
Is this a red Volvo BTW? What ratio for the rears?

 

[aquitted]

rear is a 3:58 and its a white volvo

 

[mrgoodtude]

rear is a 3:58 and its a white volvo

Thought it might be one I was looking at (White is more aerodynamic)..
All BS aside I would check with the dealer for service bulletins for your VIN..
Namely rocker issues and cam wear..I heard a rumor about same with engines in excess of 500K..