I'm looking at a 2012 Freightliner M2-112 with the Detroit 13 Liter (DD13) rated at 505HP/1800TQ. Is anyone familiar with this engine? I'll be pulling a 20K fifth wheel camper with it. It seems that it will be plenty powerful enough for the mountains but how about fuel mileage? Anyone drive one?

What transmission?A real automatic like a allison will be down a bit compared to a 'automated 'manual transmission.I get 9.2-9.4 . automated 12 speed

It's a fantastic truck. Even with the Allison its rated for 80,000 pounds combined. Fuel economy of the auto is pretty comparable to a Dodge 4500 with the 6.7L.One thing to look into however is maintenance costs. PMs are pretty involved, such as periodic valve adjustments. It is not a driveway job. So just be aware that those costs are there, and will be higher than other comparable motors.

Valves i believe (is that a overhead?) are good to 500,000,most intervals as longer(OC on mine is 40,000km) but cost more ,its a wash really.That M2is a awesome truck , class 8 power in a MDT

hone eagle wrote:Valves i believe (is that a overhead?) are good to 500,000,most intervals as longer(OC on mine is 40,000km) but cost more ,its a wash really.That M2is a awesome truck , class 8 power in a MDTOurs specified adjustment every 18,000 miles under the emergency vehicle schedule. Normal schedule was much longer, but still much more frequent than I would have guessed.

carringb wrote:hone eagle wrote:Valves i believe (is that a overhead?) are good to 500,000,most intervals as longer(OC on mine is 40,000km) but cost more ,its a wash really.That M2is a awesome truck , class 8 power in a MDTOurs specified adjustment every 18,000 miles under the emergency vehicle schedule. Normal schedule was much longer, but still much more frequent than I would have guessed.If you consider that its a highway truck engine... Some owners would be adjusting the valves every 4 1/2 weeks. 500,000 is a reasonable figure. There have been some issues with the high horsepower Detroits and longevity, but I don't think it will be an issue pulling such a light load. Fuel mileage should be somewhere 8-10, no worse than a pickup...

2012 Freightliner M2-112 | Good Sam Community

33 Replies

hone_eagle
Explorer
Jan 27, 2013
Valves i believe (is that a overhead?) are good to 500,000,most intervals as longer(OC on mine is 40,000km) but cost more ,its a wash really.
That M2is a awesome truck , class 8 power in a MDT
carringb
Explorer
Jan 27, 2013
It's a fantastic truck. Even with the Allison its rated for 80,000 pounds combined. Fuel economy of the auto is pretty comparable to a Dodge 4500 with the 6.7L.

One thing to look into however is maintenance costs. PMs are pretty involved, such as periodic valve adjustments. It is not a driveway job. So just be aware that those costs are there, and will be higher than other comparable motors.
hone_eagle
Explorer
Jan 27, 2013
What transmission?
A real automatic like a allison will be down a bit compared to a 'automated 'manual transmission.
I get 9.2-9.4 . automated 12 speed

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2012 Freightliner M2-112

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