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instarx · 12-30-2008, 05:26 PM

I have a G30 and when its running I get 15-20 mpg. Of course its diesel and not a box van (its a 15-passenger van). Some of the things that do or would help my mileage are:

Panel the bottom - there are HUGE open areas under there and the underside is an aerodynamic nightmare. The van sits way high, so this will be very good for G30 mileage. Smoothing the underside is better than an air dam.
P&G as much as you can. My van coasts twice as far as my Volvo and no one gets as mad at you in a van.
Switch to smooth highway tires if possible. My mileage dropped 3-4 mpg when I switched to M&S tires.
Inflate those tires to max sidewall pressure
Some sort of aero mod to transition between the cab body and the box would be a big help I think. Not applicable to me.
Replace the belt driven fan with electrics. No diesel G30 can do this but gassers can. That huge belt driven fan steals 15 to 20 HP.

12-30-2008, 05:26 PM	#8 (permalink)
instarx EcoModding Dilatant Join Date: Jul 2008 Location: NC Posts: 262 Volvo - '00 Volvo V70 XC AWD SE 90 day: 27.7 mpg (US) Thanks: 4 Thanked 27 Times in 17 Posts	I have a G30 and when its running I get 15-20 mpg. Of course its diesel and not a box van (its a 15-passenger van). Some of the things that do or would help my mileage are: Panel the bottom - there are HUGE open areas under there and the underside is an aerodynamic nightmare. The van sits way high, so this will be very good for G30 mileage. Smoothing the underside is better than an air dam. P&G as much as you can. My van coasts twice as far as my Volvo and no one gets as mad at you in a van. Switch to smooth highway tires if possible. My mileage dropped 3-4 mpg when I switched to M&S tires. Inflate those tires to max sidewall pressure Some sort of aero mod to transition between the cab body and the box would be a big help I think. Not applicable to me. Replace the belt driven fan with electrics. No diesel G30 can do this but gassers can. That huge belt driven fan steals 15 to 20 HP. Last edited by instarx; 12-30-2008 at 05:31 PM..