Diesel options that don't have DPF....
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The new Sky-Activ diesel does not use DEF yet.
Originally Posted By: bdcardinal
The new Sky-Activ diesel does not use DEF yet.
The australian version does. I would assume any diesel mazda brings to the USA would have it too.
http://news.drive.com.au/drive/motor-new...0821-24k6w.html
The new Sky-Activ diesel does not use DEF yet.
The australian version does. I would assume any diesel mazda brings to the USA would have it too.
http://news.drive.com.au/drive/motor-new...0821-24k6w.html
What is your reservation about a DPF? Just asking......
JHZR2
Staff member
DPFs dont have to stop on the side of the road to regenerate.
Do you have the same concerns with catalytic converters in your ga$$er?
Do you have the same concerns with catalytic converters in your ga$$er?
VW Golf and Jetta do not have DPF, IIRRC.
VW Passat and Toureg do. DPF regeneration takes place while car is in motion - no action required by driver.
VW's urea filler hole is in the trunk - bad move, IMO. Other German marques have the filler outside the passenger compartment next to the fuel fill hole.
VW Passat and Toureg do. DPF regeneration takes place while car is in motion - no action required by driver.
VW's urea filler hole is in the trunk - bad move, IMO. Other German marques have the filler outside the passenger compartment next to the fuel fill hole.
Originally Posted By: JHZR2
DPFs dont have to stop on the side of the road to regenerate.
Do you have the same concerns with catalytic converters in your ga$$er?
I haven't heard stories of people stuck on the side of the road while a catalytic converter regens.
I thought if you were stuck in hours of slow traffic and the regeneration cycle can't complete, and you can't get to above 38mph for an extended period, your car goes into cripple mode? Is that not true?
DPFs dont have to stop on the side of the road to regenerate.
Do you have the same concerns with catalytic converters in your ga$$er?
I haven't heard stories of people stuck on the side of the road while a catalytic converter regens.
I thought if you were stuck in hours of slow traffic and the regeneration cycle can't complete, and you can't get to above 38mph for an extended period, your car goes into cripple mode? Is that not true?
I can't tell when my 35d regens. Excessive idling, SOME fuel additives, poor quality diesel fuel, and the wrong engine oil can cause a DPF to fail. Watch what you use and watch how you operate it and I doubt you'll have any more issues with a diesel DPF than you will with a catalytic converter on a gas engine.
I'm certainly NOT directing this statement towards you but MOST times people that have issues with DPF's are guilty of the above or when talking about diesel-powered pick-ups, have a programmer/performance chip on board.
Are you looking for a diesel pax car, light duty tow-capable, or medium/heavy duty diesel?
I'm certainly NOT directing this statement towards you but MOST times people that have issues with DPF's are guilty of the above or when talking about diesel-powered pick-ups, have a programmer/performance chip on board.
Are you looking for a diesel pax car, light duty tow-capable, or medium/heavy duty diesel?
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Our big straight trucks run for days at virtual idle and have trouble with regen cycles. I don't think it would be an issue for a passenger car. The big trucks regen at <2k rpm.
I think the one's that end up crippled have already had plenty of fair warning a manual (forced) regeneration is required....typically caused by way excessive idling. Forced regens are pretty rare if driven correctly.
If a vehicle is going to be CONTINUALLY driven in very slow moving traffic then a diesel is probably not a good choice for power and depending on the circumstances and power requirement, a series-hybrid (not a parallel-hybrid) might be a better choice since the engine runs at steady-state.
If a vehicle is going to be CONTINUALLY driven in very slow moving traffic then a diesel is probably not a good choice for power and depending on the circumstances and power requirement, a series-hybrid (not a parallel-hybrid) might be a better choice since the engine runs at steady-state.
Originally Posted By: Fleetmon
I think the one's that end up crippled have already had plenty of fair warning a manual (forced) regeneration is required....typically caused by way excessive idling. Forced regens are pretty rare if driven correctly.
I agree and it wouldn't be normal traffic for me but it could happen without having [censored] freeze over first. I'd rather not be paranoid about that if i get stuck on a highway somewhere in a traffic jam/closed highway.
EDIT: I'm just keeping an eye out for passenger cars and small SUVs that might be woth considering in the future.
I think the one's that end up crippled have already had plenty of fair warning a manual (forced) regeneration is required....typically caused by way excessive idling. Forced regens are pretty rare if driven correctly.
I agree and it wouldn't be normal traffic for me but it could happen without having [censored] freeze over first. I'd rather not be paranoid about that if i get stuck on a highway somewhere in a traffic jam/closed highway.
EDIT: I'm just keeping an eye out for passenger cars and small SUVs that might be woth considering in the future.
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Large diesels if forced to idle (or run at low speeds) are better off getting forced regens at X gallons of fuel consumed otherwise they can cause an issue. The rpm's don't dictate the efficiency of a regen, exhaust temperatures do. Back in my day, 1100'F - 1200'F exhaust temps could clean out a DPF to around 4% or 5% remaining ash.
A Tech II or similar with the proper cartridge for your engine will allow you to watch the exhaust temps and regen cleanliness.
A Tech II or similar with the proper cartridge for your engine will allow you to watch the exhaust temps and regen cleanliness.
Our vehicles that give us the most regen troubles are Duramax diesels that operate on an approx 15 hour duty cycle (they idle about 4 hours of that - all are hot-seaters)....with that in mind, most times they don't start to power down for approximately three days....all the while giving continual warnings of exhaust restriction and the HUGE amber dash light on that no driver has EVER seen. We have on occasion had pax write in and ask what the "big yellow light on the dash" is for?
The HD diesels don't have as much trouble since they are equipped with a idle shutdown system and don't have the opportunity to idle near as much as the others.
The HD diesels don't have as much trouble since they are equipped with a idle shutdown system and don't have the opportunity to idle near as much as the others.
I like the VW diesels as Boyd pointed out.
Originally Posted By: JHZR2
DPFs dont have to stop on the side of the road to regenerate.
Do you have the same concerns with catalytic converters in your ga$$er?
They most certainly do! If full, they ABSOLUTELY DO require you to stop & do a regen!
DPFs dont have to stop on the side of the road to regenerate.
Do you have the same concerns with catalytic converters in your ga$$er?
They most certainly do! If full, they ABSOLUTELY DO require you to stop & do a regen!
Originally Posted By: oily boyd
VW's urea filler hole is in the trunk - bad move, IMO.
That's to purposely keep the two apart when filling. The average owner would somehow/some way/ some day mix the two and then there would be costly damage.
VW's urea filler hole is in the trunk - bad move, IMO.
That's to purposely keep the two apart when filling. The average owner would somehow/some way/ some day mix the two and then there would be costly damage.
Originally Posted By: Kruse
Originally Posted By: oily boyd
VW's urea filler hole is in the trunk - bad move, IMO.
That's to purposely keep the two apart when filling. The average owner would somehow/some way/ some day mix the two and then there would be costly damage.
We have seen that happen on ford trucks a lot. It is never cheap to fix either. You either replace the entire SCR/DEF system if they put diesel in the DEF, or every fuel system component if they put DEF in the fuel.
Originally Posted By: oily boyd
VW's urea filler hole is in the trunk - bad move, IMO.
That's to purposely keep the two apart when filling. The average owner would somehow/some way/ some day mix the two and then there would be costly damage.
We have seen that happen on ford trucks a lot. It is never cheap to fix either. You either replace the entire SCR/DEF system if they put diesel in the DEF, or every fuel system component if they put DEF in the fuel.
Like Fleetmon noted, the people who have real issues with regen are those that let their trucks idle for extremely extended periods of time or operate them exclusively at low speeds. Even then, it take a heck of a long time and you get PLENTY of warning.
If you choose to ignore that warning and are forced into a regen, I have about as much sympathy for you as ignoring the low fuel light and running out of gas.
"Darn those pesky internal combustion engines! Always making me pull off the road to regenerate the fuel in the tank!"
Additionally, all VW diesels in the US now have a DPF. Golf and Jetta included.
If you choose to ignore that warning and are forced into a regen, I have about as much sympathy for you as ignoring the low fuel light and running out of gas.
"Darn those pesky internal combustion engines! Always making me pull off the road to regenerate the fuel in the tank!"
Additionally, all VW diesels in the US now have a DPF. Golf and Jetta included.
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