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RodeWorthy · 09-10-2009, 07:59 PM

For comparison I get just under 10 MPG towing my 36RS3 with an '08 Chevy 3500 dually with all the exhaust filters --- DPF et al. Always under 60 MPH except on some extreme downhill grades. Unless in an area where I need it I leave tow-haul off. This allows me to run in 6th gear between 1500 and 1600 RPM. I don't think you have the 6th gear.

The tow-haul is useful when negotiating hills and in variable speed traffic. Transmission 'braking' is much improved in tow-haul mode.

Do you check your mileage with the Driver Information Center (DIC) or calculate it yourself based on fuel volume and miles driven?

09-10-2009, 07:59 PM	#10
RodeWorthy Senior Member Join Date: Oct 2005 Location: Woodstock, Ontario Posts: 370	Poor mileage with Duramax For comparison I get just under 10 MPG towing my 36RS3 with an '08 Chevy 3500 dually with all the exhaust filters --- DPF et al. Always under 60 MPH except on some extreme downhill grades. Unless in an area where I need it I leave tow-haul off. This allows me to run in 6th gear between 1500 and 1600 RPM. I don't think you have the 6th gear. The tow-haul is useful when negotiating hills and in variable speed traffic. Transmission 'braking' is much improved in tow-haul mode. Do you check your mileage with the Driver Information Center (DIC) or calculate it yourself based on fuel volume and miles driven? __________________ RodeWorthy '07 Mobile Suites 36RS3 #3910 Mor/ryde IS, Trailersaver TS3 hitch Level-Up with Remote Control 4 x 135W Solar Panels, Outback Controller, 4 x 6V batteries, Xantrex Inverter/Charger '08 Chevy 3500 dually Duramax/Allison