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BMW Diesel Owners / Enthusiasts
Do you own a diesel powered BMW? Maybe a 335d or a BMW x35d? Come and talk about what makes your car great!

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  #1  
Old 05-19-2015, 10:59 PM
kdubrow kdubrow is offline
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Diesel or Gas??

I am about to buy a BMW but can't decide which way to go. I'm looking into 2010/11 335's but really want to pick up a 335d. Are there any major reliability issues I should be aware of that may push me more to a regular 335 instead of the diesel?
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  #2  
Old 05-19-2015, 11:07 PM
d geek d geek is offline
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yes. Search on carbon build up (CBU).
good luck
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  #3  
Old 05-20-2015, 09:47 AM
jansGT jansGT is offline
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My all previous cars were gas. Now I have 530d (first diesel in my entire life) and I think this is going to be the last one. Well it takes you from A to B, quite nicely, BUT! - the response is like in "slow motion"...
I came from 335i so the difference is huge! Gas is gas. And diesel is good, -for tractors
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  #4  
Old 05-20-2015, 01:13 PM
n1das n1das is offline
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Quote:
Originally Posted by jansGT View Post
My all previous cars were gas. Now I have 530d (first diesel in my entire life) and I think this is going to be the last one. Well it takes you from A to B, quite nicely, BUT! - the response is like in "slow motion"...
I came from 335i so the difference is huge! Gas is gas. And diesel is good, -for tractors
I'm in the exact opposite camp. I drive around 1k miles/week between my work commute (total 110 miles/day, all highway) and having a life outside of work. At the rate I log the miles, 100k miles is a little under 2 years of driving for me. Like many on this site I also happen to LIKE to drive and is what attracts me to BMWs. I've been driving diesel cars for the past 13 years and logged a combined total of more than 700k miles on them and absolutely WILL NOT own another gasser (hybrids included) ever again if I can help it. No more gassers! ALL future vehicle purchases of mine shall only be DIESEL vehicles. Gassers are not even a consideration at all when car shopping.

Good luck.

Last edited by n1das; 05-20-2015 at 01:28 PM.
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  #5  
Old 05-20-2015, 01:51 PM
Doug Huffman Doug Huffman is offline
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Buy horsepower, drive torque.
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  #6  
Old 05-20-2015, 02:21 PM
BlueC BlueC is offline
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I do mostly shorter trips (5-15 miles round trip), with longer trips (>20mi) thrown in here and there.

No regrets with diesel. My fuel economy probably isn't the best, but I'm still average (at worst) 29-30mpg in the winter, and right now I'm between 35-37mpg combined (mostly city). On longer trips in ideal temps, I can average close to 50mpg. All while putting out over 300 ft/lbs tq.

Even though diesel isn't as ideal for city driving, the torque makes up for it!
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  #7  
Old 05-20-2015, 05:31 PM
Enthusiast 456 Enthusiast 456 is offline
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Quote:
Originally Posted by n1das View Post
I'm in the exact opposite camp. I drive around 1k miles/week between my work commute (total 110 miles/day, all highway) and having a life outside of work. At the rate I log the miles, 100k miles is a little under 2 years of driving for me. Like many on this site I also happen to LIKE to drive and is what attracts me to BMWs. I've been driving diesel cars for the past 13 years and logged a combined total of more than 700k miles on them and absolutely WILL NOT own another gasser (hybrids included) ever again if I can help it. No more gassers! ALL future vehicle purchases of mine shall only be DIESEL vehicles. Gassers are not even a consideration at all when car shopping.

Good luck.
X2 on that. I can't see ever buying another gasoline powered car, after having a diesel. Besides the fact that I no longer carry a tankfull of explosive fuel, the diesel has gobs more torque and 46mpg ain't bad either. I like the way it launches once the turbo spools up.

My next one will be another 328d or maybe a 535d if things are going good at work LOL.
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  #8  
Old 05-20-2015, 08:26 PM
txagbmw txagbmw is offline
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Quote:
Originally Posted by jansGT View Post
My all previous cars were gas. Now I have 530d (first diesel in my entire life) and I think this is going to be the last one. Well it takes you from A to B, quite nicely, BUT! - the response is like in "slow motion"...
I came from 335i so the difference is huge! Gas is gas. And diesel is good, -for tractors
Your right stay with gas. Not just the slow around town performance, its the noise.
If drive allot of miles or Highway, the diesel might be good. But just around town
no. Got my 13X because of rebates and discounted price.
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  #9  
Old 05-21-2015, 04:03 AM
Doug Huffman Doug Huffman is offline
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Diesel is just as explosive as is gasoline. Neither will explode as a liquid, both will explode as a vapor of droplets mixed with air.
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  #10  
Old 05-21-2015, 05:06 AM
d geek d geek is offline
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Quote:
Originally Posted by Doug Huffman View Post
Diesel is just as explosive as is gasoline. Neither will explode as a liquid, both will explode as a vapor of droplets mixed with air.
But the point where these fuels go into vapor form is a better indication of their "explosiveness":
Quote:
The flash point of a chemical is the lowest temperature where enough fluid can evaporate to form a combustible concentration of gas.
The flash point is an indication of how easy a chemical may burn. Materials with higher flash points are less flammable or hazardous than chemicals with lower flash points.

Fuel Flash Point (*F)

Biodiesel 266

Diesel Fuel (2-D) 126

Gasoline -45
helpful link
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  #11  
Old 05-21-2015, 10:15 AM
n1das n1das is offline
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Originally Posted by txagbmw View Post
Your right stay with gas. Not just the slow around town performance, its the noise.
If drive allot of miles or Highway, the diesel might be good. But just around town
no. Got my 13X because of rebates and discounted price.
WHAT noise? My 535d is actually quieter than a 535i gasser at idle from what I've been told by a car enthusiast friend of mine who has stood beside both and carefully listened. It's quieter than many gassers. On the highway it's quieter than most gassers due to the lower RPMs and quieter exhaust.

My 2012 X3 35d has a little more of a growl to it than the 535d has under load but I like it.

I love the nice purrrrrrrrrrrrrr and more husky sound of a modern turbodiesel engine. I recently owned a Ford F-350 SuperDuty truck with the 6.4L PowerStroke Diesel engine. I loved hearing the whistle of the turbo spooling up when under load (2 turbos, compound sequential setup). OTOH gassers are boring to listen to IMHO.

Contrary to popular belief, diesels actually do well around town too for MPGs given that they barely sip fuel at idle and use no fuel when decelerating in gear with no throttle input. You don't take as much of a hit in MPGs compared to gassers when just putting around town. What's bad in the city is that trips may not be long enough to get the engine fully up to operating temp especially during winter. Modern turbodiesels thrive on being regularly driven hard and for long periods.

Bottom line is either you want the diesel or you don't. If you want the diesel then go for it. If not, there are plenty of gassers to choose from.

Good luck.

Last edited by n1das; 05-21-2015 at 10:33 AM.
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  #12  
Old 05-21-2015, 10:26 AM
n1das n1das is offline
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Originally Posted by d geek View Post
But the point where these fuels go into vapor form is a better indication of their "explosiveness":

helpful link
What d geek said.

To help put things into perspective, if you were to pour some diesel fuel on a lighted match, it will extinguish the flame. Definitely DO NOT try this at home with gasoline!
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  #13  
Old 05-21-2015, 11:02 AM
SpeedyD SpeedyD is offline
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Obviously, they each have their pros/cons. I absolutely love the 335d and have no regrets about selecting it over a 335i.
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  #14  
Old 05-21-2015, 11:12 AM
FredoinSF FredoinSF is online now
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Quote:
Originally Posted by txagbmw View Post
Your right stay with gas. Not just the slow around town performance, its the noise.

If drive allot of miles or Highway, the diesel might be good. But just around town

no. Got my 13X because of rebates and discounted price.

My, what a different tune from November 2013... Buyer's remorse?


Quote:
Originally Posted by txagbmw View Post
I too like the sound, its different. Not the sound of my v8 vette but its got a deep intake growl. I never liked any of my 6 cyl
cars sounds, even the 335i too much of a buzz. Even on my large diesel Ford, its a power sound. Sure for some women
going to tea it won't be there bag.
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  #15  
Old 05-21-2015, 11:53 AM
kdubrow kdubrow is offline
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from a reliability standpoint which am I better off with? I have a diesel Vw now and love the low end power and torque so I'm not worried about that part of it.
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  #16  
Old 05-21-2015, 06:02 PM
Doug Huffman Doug Huffman is offline
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Quote:
Originally Posted by d geek View Post
But the point where these fuels go into vapor form is a better indication of their "explosiveness"
Combustion is not explosion, it is burning.
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  #17  
Old 05-22-2015, 06:53 AM
KeithS KeithS is offline
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Mein Auto: '11 335d, '00 540iT
Quote:
Originally Posted by n1das View Post
WHAT noise? ....

I love the nice purrrrrrrrrrrrrr and more husky sound of a modern turbodiesel engine...

Contrary to popular belief, diesels actually do well around town too for MPGs..... g
I find our 335D has minimal lag. But you certainly feel the push on your backside when the big turbo spools up.

I also do not find it noisy. Inside the car same or quieter than the gas engine. It does have a nice growl under power which I find nicely reassuring. I also see that my tailpipes are cleaner than the gas engine cars such as the 335i.

I personally do not think it gets very good MPG around town. As others have stated the extra weight of the diesel engine is the stop/go MPG killer.
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  #18  
Old 05-22-2015, 07:05 AM
Jamolay Jamolay is offline
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Quote:
Originally Posted by KeithS View Post


I personally do not think it gets very good MPG around town. As others have stated the extra weight of the diesel engine is the stop/go MPG killer.

I don't think any car gets good MPG around town. We would have to compare cars of equal weight and power, but I suspect the diesel would still do better.
The real problem is starting from a stop, more than anything, and that takes a lot of fuel regardless of type.
The diesel does shine at steady long highway speeds, so much so that its stop and go performance seems to suffer, but that is a relative thing.
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  #19  
Old 05-22-2015, 07:23 AM
KeithS KeithS is offline
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I think what everyone is saying, that the loss of MPG for the 335D around town is a much higher percentage than the gas version of the car. On the highway where the D gets 30% better MPG than the 335i, around town the two cars will get nearly the same MPG.
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  #20  
Old 05-22-2015, 07:28 AM
BlueC BlueC is offline
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Quote:
Originally Posted by KeithS View Post
around town the two cars will get nearly the same MPG.
I find that hard to believe.

Both my 335i and Z4 35i averaged 20-23mpg combined (mostly city). When I had a 335d as a loaner, I was closer to 28-30mpg in the same conditions. That's nearly a 50% increase. Most of my driving is shorter trips, which is clearly a worst-case scenario for diesels.

My 328d has been averaging 35-37mpg combined, closer to 45-50mpg when on long trips. I'm not aware of the 328i being able to average such high fuel economy.

Fuelly's stats alone would contradict that statement.
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  #21  
Old 05-22-2015, 07:34 AM
KeithS KeithS is offline
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The 328d does not have nearly the weight penalty of the 335d.
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  #22  
Old 05-22-2015, 08:20 AM
BlueC BlueC is offline
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Quote:
Originally Posted by KeithS View Post
The 328d does not have nearly the weight penalty of the 335d.
Well understood. I was comparing the 328d to the 328i in addition to the original point.

My point was that when I compared the 335i to the 335d, I still saw a noticeable increase in fuel economy around town (sans highway).
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  #23  
Old 05-22-2015, 10:06 AM
Sushiholic Sushiholic is offline
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I can guarantee you that around town the 335d gets better mileage than the 335i....by a hefty margin. it is not really weight that kills it as someone put it.... the published curb weight difference between the two is 232 pounds.
sure stop and go is bad, but its worse in the 335i......I sit in Houston traffic......on a bad day I get 32 on a good day 36. My 17 year old son can somehow manage to get it under 30....his Dinan E46 M3 has some size tank. at 300 miles I am at half tank, at 300 miles he well into the next tank. Diesel all the way.
My wife drives the GL 320cdi.......love it. We have friends with the same car in a 550 they get about half the mileage. granted the cdi does not have the power of the bmw, and weighs a ton, but its a great touring car.....houston - san diego in 21 hours, at 23 mpg
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  #24  
Old 06-22-2015, 03:55 AM
HoffmanAndrew HoffmanAndrew is offline
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Quote:
Originally Posted by KeithS View Post
I think what everyone is saying, that the loss of MPG for the 335D around town is a much higher percentage than the gas version of the car. On the highway where the D gets 30% better MPG than the 335i, around town the two cars will get nearly the same MPG.
I agree with Keith. The MPG of diesel is far better than gas. If you are driving on a freeway, you'll be definitely saving some diesel and the diesel performance parts helps you to get great MPG. The 335d posts about a 28-percent mileage improvement over the 328i in the city and 29 percent on the highway. With diesel currently selling at less than five percent more than the premium fuel required in the 335i, the 335d will definitely cost you less at the pump.
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  #25  
Old 06-22-2015, 09:08 AM
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floydarogers floydarogers is offline
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Mein Auto: 335d, 328d, Toyota T100
My son drives a '07 335i Coupe. I drive a 2010 335d sedan. I get 5 mpg or better than him, in all comparable conditions. An n54 engine is quite good on mileage for an engine of it's size, but the diesel is just better in that regard.
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