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Cold weather and AFM

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2014 Sporty Shorty Enthusiast

2014 Sporty Shorty

Posted
Posted

I live in Fairbanks....

 

I'm wondering what the -50 and colder will do to the AFM. Hell, it's 0 right now. Good thing I have a heated garage where it's 70 degrees, lol.

Just buy a tuner and get rid of it. It does more harm then good so I don't see why anyone would leave it activated.

  • 4 years later...
Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted
On ‎11‎/‎13‎/‎2013 at 7:03 PM, waumo1 said:

1.5 to 2 MPG loss in all my vehicles as soon as the stations switch to winter blend.

Last 16 tank average 25.9 mpg. Previous 16 tanks? 28.5 mpg. A 9% decline. The dividing line between these two is Sept 15th. The day of fuel change from summer to winter fuel. Just a higher Reed Vapor Pressure. More Butane. Can we blame all the decline on the fuel? No. Not with reason. Why? The weather changes. A bunch in my area. Temperatures decline winds increase. And while it may seem odd to those who don’t live in the corn belt, crops come down and the land is laid bare. The truck is no longer shielded from the wind by 8 foot tall crops a few feet either side of the roadway. And of course longer warm up periods and lower fluid temperatures in cases not moderated by the radiator. Transmission is a big one in the new trucks that bypass the radiator as long as the fluid remains below 190 F. Diffs and X-fer cases. Wheel bearing grease and yes even shock oil. We drive shorter distances and take fewer trips resulting in few ‘hot’ hours for those miles. Viscosity of fluids is a HUGE parasitic drag. AFM is load sensitive.  Snow, when it’s on the ground consumes fuel in drag and slip. It isn’t just the fuel mix.

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