The math doesn't add up jack ass. You are basically in the realm of 200k miles to see the cost savings on ah the money you just spent to be "efficent".
This is diesel bros new argument btw. That the truck gets better mpg there for it's better for the be environment.
delete?
Egr delete, which is bypassing the Exhaust Gas Recirculation systems required in all diesel vehicles so they don't pollute nearly as much.
The delete increases mpg and power, at the cost of everyone's lungs.
the penalty should be death by exhaust asphyxiation