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Speaking of cars, Diesel vs gas engine
Posted by: bruceko
Date: August 13, 2013 06:57PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: yeoman
Date: August 13, 2013 07:09PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: N-OS X-tasy!
Date: August 13, 2013 07:32PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: DinerDave
Date: August 13, 2013 07:44PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: MGS_forgot_password
Date: August 13, 2013 07:51PM
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Any other things I should consider beyond the cost break even point?
Re: Speaking of cars, Diesel vs gas engine
Posted by: Pat
Date: August 13, 2013 07:52PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: M A V I C
Date: August 13, 2013 07:59PM
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MGS_forgot_password
The gas engine will also run just fine on regular, saving you a bit of money with a small reduction in performance. (which you may not notice)
Re: Speaking of cars, Diesel vs gas engine
Posted by: Racer X
Date: August 13, 2013 08:37PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: Gareth
Date: August 13, 2013 08:54PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: JPK
Date: August 13, 2013 09:28PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: (vikm)
Date: August 13, 2013 09:31PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: Speedy
Date: August 13, 2013 09:36PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: bruceko
Date: August 13, 2013 09:41PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: gabester
Date: August 13, 2013 09:42PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: davester
Date: August 13, 2013 09:43PM
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Racer X
lower maintanence frequency and engine longevity are why diesels are hugely popular overseas.
Re: Speaking of cars, Diesel vs gas engine
Posted by: JoeH
Date: August 13, 2013 09:53PM
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gabester
Can someone explain to me why they don't make diesel-electric hybrid cars? This would seem to make the best of all possible vehicular worlds - the battery provides the quick pickup and performance and the diesel extends that mileage longevity even further and allows you to cruise down the highway at decent speeds.
g=
Re: Speaking of cars, Diesel vs gas engine
Posted by: Racer X
Date: August 13, 2013 09:59PM
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gabester
I know that diesel engines convert the fuel more efficiently than gas engines.
Can someone explain to me why they don't make diesel-electric hybrid cars? This would seem to make the best of all possible vehicular worlds - the battery provides the quick pickup and performance and the diesel extends that mileage longevity even further and allows you to cruise down the highway at decent speeds.
I have no particular feeling about this scenario... but do like the sound of biodiesel.
g=
Re: Speaking of cars, Diesel vs gas engine
Posted by: Gareth
Date: August 13, 2013 10:03PM
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gabester
Can someone explain to me why they don't make diesel-electric hybrid cars?
Re: Speaking of cars, Diesel vs gas engine
Posted by: davester
Date: August 13, 2013 10:14PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: Spock
Date: August 13, 2013 10:30PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: M A V I C
Date: August 13, 2013 10:46PM
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davester
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Racer X
lower maintanence frequency and engine longevity are why diesels are hugely popular overseas.
I'm not sure where you're talking about, but in Europe that was only true in the olden days. The main reason europeans buy diesels is that fuel prices are almost twice as high as here (or more in some cases). Maintenance costs are essentially the same as modern gas cars, and most people don't keep their gas cars to the point where engine longevity is an issue any more (i.e. well north of 100k miles on modern gas cars).
Re: Speaking of cars, Diesel vs gas engine
Posted by: Speedy
Date: August 13, 2013 10:50PM
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davester
What Gareth said is correct. Diesel and electric torque characteristics are not complementary whereas gas and electric are.
Re: Speaking of cars, Diesel vs gas engine
Posted by: Gareth
Date: August 13, 2013 11:37PM
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Speedy
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davester
What Gareth said is correct. Diesel and electric torque characteristics are not complementary whereas gas and electric are.
Big gensets are all Diesels. The users, like hospitals, are not concerned about economy as much as reliability. Diesel hybrids exist in Europe and get better mileage (for equal sized vehicles) than any gas hybrid. The high torque is ideally suited to turn a generator. Americans seem to not like Diesels until they drive one.
Re: Speaking of cars, Diesel vs gas engine
Posted by: Speedy
Date: August 13, 2013 11:42PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: ztirffritz
Date: August 13, 2013 11:56PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: davester
Date: August 14, 2013 12:15AM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: N-OS X-tasy!
Date: August 14, 2013 12:51AM
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JPK
Most of the new diesels need "deer piss" as a consumable that gets injected to keep emissions lower. Although it is not actually deer piss, the synthetic urea can be a pricey additive that most people don't consider.
Re: Speaking of cars, Diesel vs gas engine
Posted by: C(-)ris
Date: August 14, 2013 01:33AM
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M A V I C
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davester
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Racer X
lower maintanence frequency and engine longevity are why diesels are hugely popular overseas.
I'm not sure where you're talking about, but in Europe that was only true in the olden days. The main reason europeans buy diesels is that fuel prices are almost twice as high as here (or more in some cases). Maintenance costs are essentially the same as modern gas cars, and most people don't keep their gas cars to the point where engine longevity is an issue any more (i.e. well north of 100k miles on modern gas cars).
It's still true. I've asked several shops about it. The TDIs last a lot longer and require less maintenance.
Re: Speaking of cars, Diesel vs gas engine
Posted by: eustacetilley
Date: August 14, 2013 02:16AM
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Speedy
The Diesel hybrid once discussed on the forum was a Peugeot. There are others.
Re: Speaking of cars, Diesel vs gas engine
Posted by: lost in space
Date: August 14, 2013 08:45AM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: Pat
Date: August 14, 2013 10:23AM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: N-OS X-tasy!
Date: August 14, 2013 01:31PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: Bill in NC
Date: August 14, 2013 01:37PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: N-OS X-tasy!
Date: August 14, 2013 02:47PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: Pat
Date: August 14, 2013 04:11PM
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N-OS X-tasy!
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Pat
One more to think about, the DPF. The Diesel Particulate Filter captures what most people associate with diesel exhaust, the soot.
Also not necessary on the new Mazda6 diesel. It really is a remarkable piece of work.
Re: Speaking of cars, Diesel vs gas engine
Posted by: N-OS X-tasy!
Date: August 14, 2013 06:21PM
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Pat
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N-OS X-tasy!
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Pat
One more to think about, the DPF. The Diesel Particulate Filter captures what most people associate with diesel exhaust, the soot.
Also not necessary on the new Mazda6 diesel. It really is a remarkable piece of work.
Yes it is necessary and it is on the current Euro models and will be on the US models. In the actual specs it clearly references the combo oxidizing catalyst/DPF filter along with the whole EGR setup. The only thing not being used is a separate downstream NOx treatment.
Re: Speaking of cars, Diesel vs gas engine
Posted by: space-time
Date: August 14, 2013 07:08PM
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Gareth
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Speedy
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davester
What Gareth said is correct. Diesel and electric torque characteristics are not complementary whereas gas and electric are.
Big gensets are all Diesels. The users, like hospitals, are not concerned about economy as much as reliability. Diesel hybrids exist in Europe and get better mileage (for equal sized vehicles) than any gas hybrid. The high torque is ideally suited to turn a generator. Americans seem to not like Diesels until they drive one.
A diesel genset is a different application than a hybrid car. In that case, you're using a diesel engine to produce electricity. If you used that application on a car, you would use a diesel engine to RUN the electric motor. This is different than what we consider a hybrid car (i.e. Prius which has two separate drivetrains, either the electric motor or the gas engine can turn the wheels). That application is more like a Chevy Volt, a range extending electric/plug-in car, in which the electric motor always turns the wheels and the engine powers the electric motor if need be.
Personally, I think carrying around two drivetrains (ala Prius) is rather stupid, and think that in the case of the Chevy Volt (a range extending electric/plug-in), a diesel engine might make sense.
What diesel hybrids are in Europe? Are they like the Prius (two drivetrains?) or Volt (only electric drivetrain)?
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The Volt operates as a pure battery electric vehicle until its plug-in battery capacity drops to a predetermined threshold from full charge. From there its internal combustion engine powers an electric generator to extend the vehicle's range if needed. Once the engine is running in this extended range mode, it may at times be linked mechanically (via a clutch) to assist the traction motor in propelling the car in order to improve energy efficiency. The Volt's regenerative braking also contributes to the on-board electricity generation.
Re: Speaking of cars, Diesel vs gas engine
Posted by: bruceko
Date: August 14, 2013 07:43PM
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Re: Speaking of cars, Diesel vs gas engine
Posted by: M A V I C
Date: August 14, 2013 08:08PM
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C(-)ris
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M A V I C
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davester
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Racer X
lower maintanence frequency and engine longevity are why diesels are hugely popular overseas.
I'm not sure where you're talking about, but in Europe that was only true in the olden days. The main reason europeans buy diesels is that fuel prices are almost twice as high as here (or more in some cases). Maintenance costs are essentially the same as modern gas cars, and most people don't keep their gas cars to the point where engine longevity is an issue any more (i.e. well north of 100k miles on modern gas cars).
It's still true. I've asked several shops about it. The TDIs last a lot longer and require less maintenance.
It is true, for VW anyway. A Jetta TDI is good for 300 to 350k miles before it needs a full blown rebuild. It is common to see them running around with that many miles on them. You don't see any gas Jetta's with 300k on the stock engine. A 1.8T or a 2.0 NA is good for around 200 to 250k. You easily get another 100k miles out of the Diesel.
Re: Speaking of cars, Diesel vs gas engine
Posted by: C(-)ris
Date: August 14, 2013 11:11PM
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