When did DEF become required ?
Thinking of upgrading to a DP. I want to avoid having to deal with DEF. What year models did it become a requirement ?
Forum Discussion
wolfe10 wrote:how much increase is there?I would think the independent drivers would know their cost since they are paying for both fuel and def, that's what they tell me
I would be quite surprised if the cost of DEF (particularly if purchased at the pump) would not be more than off-set by the better fuel mileage.
Same as gasoline cars when the catalytic converter came out in 1975.
The DPF and DEF allow the engine to be run dirtier/more power and let the equipment downstream clean it up.
