What causes the diesel haze?

My truck does not smoke much that I can see during the day, but at night with headlights behind me it covers cars.

What is it and what causes it?

 

Unburned fuel and cold air condensing...You have two choices to fix problem..#1. get out of Denver to somewhere lower in elevation, #2. park truck until spring..

 

I notice it in the headlights of cars behind me as well... ???

 

I thought about unburned fuel, but that doesn't make sense when my truck gets 18.1 mpg city on winter blend fuel. ???

 

Mine does it too. Must be a reflection off the gases from the headlights.

Mike

 

You do see the light defracted by the particulate matter your engine emits. You will be able to see it in hte sunlight too if you have the sun in almost the same position relative to your truck as the headlights of the vehicle behind you.

Just my 2c

AlpineRAM