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3.0L Duramax Turbo Diesel
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<blockquote data-quote="SDMF" data-source="post: 378192" data-attributes="member: 412"><p>Just deleting DEF doesn't really do diddly shit for mileage as you still have a DPF that still needs to be run through re-gen cycles and actually without DEF your mileage gets worse as DEF's whole reason for being is to reduce re-gen cycles.</p><p></p><p>If you delete DPF/DEF/EGR in any of the big-3 HD pickups you're going to pick up 2-3MPG on the highway @ 75-80MPH like one would drive on 4-lane roads in ND. You don't gain any HP unless you then also tune away from factory settings. Adding HP is a combination of fuel mapping and boost pressure changes which is most generally NOT going to also add MPG.</p></blockquote><p></p>
[QUOTE="SDMF, post: 378192, member: 412"] Just deleting DEF doesn't really do diddly shit for mileage as you still have a DPF that still needs to be run through re-gen cycles and actually without DEF your mileage gets worse as DEF's whole reason for being is to reduce re-gen cycles. If you delete DPF/DEF/EGR in any of the big-3 HD pickups you're going to pick up 2-3MPG on the highway @ 75-80MPH like one would drive on 4-lane roads in ND. You don't gain any HP unless you then also tune away from factory settings. Adding HP is a combination of fuel mapping and boost pressure changes which is most generally NOT going to also add MPG. [/QUOTE]
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