Originally Posted By: Jetronic
Originally Posted By: john_pifer
DPFs are still being used? I had a buddy buy a new 2008 Ford F-250 diesel back in 2008 and the DPF "regeneration" cycle that it had to go through, raising idle RPM to burn off soot, absolutely destroyed any fuel economy advantage it had over a gas engine. He considered removing the DPF, but that could have been cause for a warranty claim denial, so he ended up selling it.
I think all the new diesels sold in the USA have the catalyst system using the urea fluid that you have to add every several thousand miles. Doesn't affect fuel economy.
2 different things.
Yes DPFs are still in use and Urea does nothing for Soot. Urea lowers NOx, that the dpf does nothing for.
that dpf setup in the F-250 must be very poor. My car idles the same wether or not a regen is taking place, and it takes half a quart of fuel to regen, every 600 miles on average.
My 14 PUG 1.6 90 will kick fans to full, that's how I know that the regen is taking place. That and a distinct unburned diesel smell. I'm a no smoker, friends that are do not smell anything.
As the oil gets longer in the OCI Regen occurs more frequent.
My Vectra will Regen more intrusive. If it happens in town it will smoke and smell is strong. If on motorway, nothing unusual except higher consumption for a few minutes.
Originally Posted By: john_pifer
DPFs are still being used? I had a buddy buy a new 2008 Ford F-250 diesel back in 2008 and the DPF "regeneration" cycle that it had to go through, raising idle RPM to burn off soot, absolutely destroyed any fuel economy advantage it had over a gas engine. He considered removing the DPF, but that could have been cause for a warranty claim denial, so he ended up selling it.
I think all the new diesels sold in the USA have the catalyst system using the urea fluid that you have to add every several thousand miles. Doesn't affect fuel economy.
2 different things.
Yes DPFs are still in use and Urea does nothing for Soot. Urea lowers NOx, that the dpf does nothing for.
that dpf setup in the F-250 must be very poor. My car idles the same wether or not a regen is taking place, and it takes half a quart of fuel to regen, every 600 miles on average.
My 14 PUG 1.6 90 will kick fans to full, that's how I know that the regen is taking place. That and a distinct unburned diesel smell. I'm a no smoker, friends that are do not smell anything.
As the oil gets longer in the OCI Regen occurs more frequent.
My Vectra will Regen more intrusive. If it happens in town it will smoke and smell is strong. If on motorway, nothing unusual except higher consumption for a few minutes.
