Why more diesels?

Josh123

Diamond Member
Aug 4, 2002
3,030
2
76
Ok so BMW just annouced their new line of diesel engines but why? I drive a diesel and right now the price per gallon is killing me. Is it mainly because most diesel engines last longer or what?

BMW Diesel
 

M0R0NI

Member
Jan 10, 2008
121
0
0
I think it is because there is a public perception that a diesel is better on gas milage. Not always the truth and usually the price of the diesel makes it more expensive in the long run.
 

DivideBYZero

Lifer
May 18, 2001
24,117
2
0
Originally posted by: M0R0NI
I think it is because there is a public perception that a diesel is better on gas milage. Not always the truth and usually the price of the diesel makes it more expensive in the long run.

Eh? Mileage is always better for a Diesel with a comparable engine size.
 

M0R0NI

Member
Jan 10, 2008
121
0
0
Originally posted by: DivideBYZero
Originally posted by: M0R0NI
I think it is because there is a public perception that a diesel is better on gas milage. Not always the truth and usually the price of the diesel makes it more expensive in the long run.

Eh? Mileage is always better for a Diesel with a comparable engine size.

Milage is better when hauling a load it does not get worse when worked harder. It is not always better.

 

desy

Diamond Member
Jan 13, 2000
5,447
216
106
Diesels get 30% better gas mileage when asked to do the same job as a gas engine in the same vehicle.
Diesel is cheaper here than gas, various tax structures make it different and ususally the demand cycle in inversed with gasoline so when gas is up summer diesel is usually down, diesel's demand is in winter cause its close to heating oil and less is available.

Until now demand has been low to a couple reasons.
A diesel engine technology is more expensive up front
B the fuel available in NA has been dirty high sulphur content making the tuning of the engine stinky and rough
 

mwmorph

Diamond Member
Dec 27, 2004
8,877
1
81
Originally posted by: desy
Diesels get 30% better gas mileage when asked to do the same job as a gas engine in the same vehicle.
Diesel is cheaper here than gas, various tax structures make it different and ususally the demand cycle in inversed with gasoline so when gas is up summer diesel is usually down, diesel's demand is in winter cause its close to heating oil and less is available.

Until now demand has been low to a couple reasons.
A diesel engine technology is more expensive up front
B the fuel available in NA has been dirty high sulphur content making the tuning of the engine stinky and rough

Where do you live? In IL and VA, diesel was around $3.45 while gas could be found for $2.95. That and diesel is harder to find than gas. As of now, I would never buy a non truck diesel if there's a similar gas engine.
 

Josh123

Diamond Member
Aug 4, 2002
3,030
2
76
Originally posted by: mwmorph
Originally posted by: desy
Diesels get 30% better gas mileage when asked to do the same job as a gas engine in the same vehicle.
Diesel is cheaper here than gas, various tax structures make it different and ususally the demand cycle in inversed with gasoline so when gas is up summer diesel is usually down, diesel's demand is in winter cause its close to heating oil and less is available.

Until now demand has been low to a couple reasons.
A diesel engine technology is more expensive up front
B the fuel available in NA has been dirty high sulphur content making the tuning of the engine stinky and rough

Where do you live? In IL and VA, diesel was around $3.45 while gas could be found for $2.95. That and diesel is harder to find than gas. As of now, I would never buy a non truck diesel if there's a similar gas engine.

Right now diesel is about $3.33 and gas is $2.95 I believe. Cost me $101 to fill up the other day.
 

Pliablemoose

Lifer
Oct 11, 1999
25,195
0
56
Diesels get ~25% better mileage, while diesel's price difference in the winter is ~10%

I welcome our new diesel overlords.

I've owned 2 diesel VW's, I diesel Chevrolet, and currently have a diesel Ford.

The torque of small diesels is a hoot. The I6 BMW puts out the same torque that their V12 does, and torque is what you perceive as power in a car.

Hybrid diesels will bring another level of fuel economy on the road to electric city cars.

Imagine 50-70 MPG in a Camry/Accord/Taurus sized sedan...
 

Demo24

Diamond Member
Aug 5, 2004
8,356
9
81
it goes up in winter and then in summer is generally close to regular. If you factor it out you will still save money even if it costs a bit more a few months out of the year.
 

Zenmervolt

Elite member
Oct 22, 2000
24,514
44
91
Originally posted by: M0R0NI
Originally posted by: DivideBYZero
Originally posted by: M0R0NI
I think it is because there is a public perception that a diesel is better on gas milage. Not always the truth and usually the price of the diesel makes it more expensive in the long run.

Eh? Mileage is always better for a Diesel with a comparable engine size.

Milage is better when hauling a load it does not get worse when worked harder. It is not always better.

Mileage is always better for a diesel of comparable size and power. Now, if you're comparing a 200 hp diesel to a 100 hp gasoline engine, then yes, the diesel will have worse mileage. But that's not a valid comparison.

ZV
 

Colt45

Lifer
Apr 18, 2001
19,720
1
0
Diesel is more efficient, and it's generally cheaper than gas in europe.

last time I was there I rented a Opel Zafira.. GM minivan deal. 6spd manual w/ 1.9 diesel... 45MPG with 4 people and luggage @ 100MPH sustained. Try that with a gas ;)
 

ponyo

Lifer
Feb 14, 2002
19,688
2,811
126
Diesel is more expensive than premium 93 octane where I live so mpg has to be lot higher for me to consider it.
 

jagec

Lifer
Apr 30, 2004
24,442
6
81
Originally posted by: Zenmervolt
Originally posted by: M0R0NI
Originally posted by: DivideBYZero
Originally posted by: M0R0NI
I think it is because there is a public perception that a diesel is better on gas milage. Not always the truth and usually the price of the diesel makes it more expensive in the long run.

Eh? Mileage is always better for a Diesel with a comparable engine size.

Milage is better when hauling a load it does not get worse when worked harder. It is not always better.

Mileage is always better for a diesel of comparable size and power. Now, if you're comparing a 200 hp diesel to a 100 hp gasoline engine, then yes, the diesel will have worse mileage. But that's not a valid comparison.

ZV

:thumbsup:

Plus, you can run biodiesel or veggie oil if you choose.

It's too bad that diesel is more expensive than gas in the US...it's so artificial! Everywhere else in the world I've been, diesel is cheaper, sometimes by quite a bit.
 

DivideBYZero

Lifer
May 18, 2001
24,117
2
0
Originally posted by: Zenmervolt
Originally posted by: M0R0NI
Originally posted by: DivideBYZero
Originally posted by: M0R0NI
I think it is because there is a public perception that a diesel is better on gas milage. Not always the truth and usually the price of the diesel makes it more expensive in the long run.

Eh? Mileage is always better for a Diesel with a comparable engine size.

Milage is better when hauling a load it does not get worse when worked harder. It is not always better.

Mileage is always better for a diesel of comparable size and power. Now, if you're comparing a 200 hp diesel to a 100 hp gasoline engine, then yes, the diesel will have worse mileage. But that's not a valid comparison.

ZV

I tried.
 

Zenmervolt

Elite member
Oct 22, 2000
24,514
44
91
Originally posted by: DivideBYZero
Originally posted by: Zenmervolt
Originally posted by: M0R0NI
Originally posted by: DivideBYZero
Originally posted by: M0R0NI
I think it is because there is a public perception that a diesel is better on gas milage. Not always the truth and usually the price of the diesel makes it more expensive in the long run.

Eh? Mileage is always better for a Diesel with a comparable engine size.

Milage is better when hauling a load it does not get worse when worked harder. It is not always better.

Mileage is always better for a diesel of comparable size and power. Now, if you're comparing a 200 hp diesel to a 100 hp gasoline engine, then yes, the diesel will have worse mileage. But that's not a valid comparison.

ZV

I tried.

I know. Just trying to help.

Plus idiots annoy me and I enjoy pointing out when they're wrong, even if someone else beat me to it. :p

ZV
 

Pacfanweb

Lifer
Jan 2, 2000
13,158
59
91
Originally posted by: M0R0NI
Originally posted by: DivideBYZero
Originally posted by: M0R0NI
I think it is because there is a public perception that a diesel is better on gas milage. Not always the truth and usually the price of the diesel makes it more expensive in the long run.

Eh? Mileage is always better for a Diesel with a comparable engine size.

Milage is better when hauling a load it does not get worse when worked harder. It is not always better.
Yes, it pretty much IS always better. Towing or unloaded. Name a car or light truck that has both diesel and gas engines available where the diesel gets worse mileage.

Still waiting..........


That said, I don't see why all these snapperheads are buying diesel pickups to tow their boats and do light hauling. You will NEVER save money like that.
Diesel is generally more expensive than gas, and the initial cost of the diesel option pretty much ensures that you'll never recoup that cost.

Plus, it always kills me when you see these idiots in their Powerstrokes, Duramaxes and Cummins pickups stop somewhere and leave them running.
Like that helps anything.

When I worked at the Ford dealership, every diesel driver who was stopping by to drop off a towed car, pick up parts, etc, would leave their truck running in the service lane, like it was a semi truck. We'd always go and shut them off. They stunk and you couldn't hear a damn thing over them.

But more power to the dudes who want one. Spend that money. Just don't come around me trying to justify buying one with "better mileage" "lasts longer" "save money".
 

alimoalem

Diamond Member
Sep 22, 2005
4,025
0
0
mercedes is the only company i can think of that makes sedans with diesel engines atm (hey it's 6 a.m. and i haven't slept yet :p)

here are some numbers i found:

MODEL MPG HP/Torque Curb Weight 0-60/quarter-mile
E320 BLUETEC 23/32 210/388 3860 6.7/15.0@93.2mph
E350 17/24 268/258 3740 6.3/14.7@96.4mph
C300 21/28 228/221 3527 7.8/16.0@89.0mph (i've found 7.0-7.1s for the 0-60 as well, but couldn't find any other 1/4 mile times)

the mpg on the E320 is ~34% higher than the E350's, and ~12% higher than the C300's. And its performance is not too far off from the E350's. the e350 and c300 i assume require premium gas, but even if they don't, the C300 and E320 BLUETEC should be close in terms of gas cost and the E320 BLUETEC should still be cheaper than the E350. how many miles of driving will it take to make your money back with the diesel? i don't know. is it worth it? i can't say. what i can say is that it's stupid to say diesels don't make a difference.
 

rh71

No Lifer
Aug 28, 2001
52,844
1,049
126
Originally posted by: GTaudiophile
Torques baby yeah!
Yup that and fuel efficiency (not much but by a few mpg). Can't lose... except diesel fuel actually costs more per gallon right now. I did the math though and it evens out. I'll stick with petrol until the new diesels are more proven. I'm not too eager to deal with urea and the costs of refilling / servicing that.
 

Apex

Diamond Member
Oct 11, 1999
6,511
1
71
www.gotapex.com
Originally posted by: Josh123
Ok so BMW just annouced their new line of diesel engines but why? I drive a diesel and right now the price per gallon is killing me. Is it mainly because most diesel engines last longer or what?

BMW Diesel

They're banking on people caring about the true cost (mileage considering cost of fuel) instead of merely the cost to fill up a tank.
 

Vic

Elite Member
Jun 12, 2001
50,422
14,337
136
Because, all else being equal, diesel as a fuel gets ~30% better mileage with ~70% less CO2 emissions. That's why.
 

Fenixgoon

Lifer
Jun 30, 2003
33,286
12,849
136
Originally posted by: rh71
Originally posted by: GTaudiophile
Torques baby yeah!
Yup that and fuel efficiency (not much but by a few mpg). Can't lose... except diesel fuel actually costs more per gallon right now. I did the math though and it evens out. I'll stick with petrol until the new diesels are more proven. I'm not too eager to deal with urea and the costs of refilling / servicing that.

jeremy clarkson averaged over 40mpg in an audi A8 4.2TDI (the 4.2 gas is rated at 24/18). the A8 is a 4300lb car!!!

now only if they could make that 4.2 TDI stateside legal... mmmmm, even sexier than before.