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Thanks for the explanation, though I think the link explains it.

Not a diesel guy or engineer. So the crap my brother has to put in his new Ford is DEF?



I'm both an engineer and a diesel guy... And VW TDI owner. This whole thing sucks. Like Ian said, anything can be deleted, but different states have different rules for inspection and hence registration, so you have to be careful. There IS a particulate trap, even on my pre-DEF system, and the re-generation definitely hits the fuel mileage. The only guys getting 50 MPG these days are the ones who stripped off most of their emissions system. And that can be both an ethical and legal issue depending on how you feel and where you live!

Benny Black & Silver '02 Too many mods to list Not enough miles ridden