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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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  #26  
Old 02-18-2013, 10:55 AM
Penguin Penguin is offline
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Mein Auto: Z4 and X5 Diesel
Quote:
Originally Posted by gulfcoastbeemer View Post
Everyone of my diesel vehicles has regularly exceeded the EPA mileage estimates published for them. Darn if I know why. I'm going to attribute it to the power of positive thinking
Or good driving habits.
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  #27  
Old 02-18-2013, 02:00 PM
Pierre Louis Pierre Louis is offline
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Mein Auto: 2011 335d Sport
Quote:
Originally Posted by gulfcoastbeemer View Post
I'm not a genius with additives, like Clark Griswold or yourself, but empirical data of my own, collected in the form of 10-years of fuel receipts for five different diesel engine vehicles, suggests fuel economy does vary with fuel source / "quality". Everyone of my diesel vehicles has regularly exceeded the EPA mileage estimates published for them. Darn if I know why.

I'm going to attribute it to the power of positive thinking -- we know it can't be a fuel additive.
I agree, but without additives. The same car as you too - a Mercedes E320 CDI that exceeded the EPA estimates. I would get 43 mpg at 65 mph on flat land for a car rated at 37 highway in the more optimistic era before they made the "correction" on the newer models.

PL
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Last edited by Pierre Louis; 02-18-2013 at 02:01 PM.
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  #28  
Old 02-18-2013, 02:50 PM
BMWTurboDzl BMWTurboDzl is offline
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I always wondered if our vehicle programming could take advantage of higher Cetane fuel (~50 ish)

Sent from my MB525 using Bimmer App
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  #29  
Old 02-18-2013, 03:01 PM
Snipe656 Snipe656 is offline
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Originally Posted by BMWTurboDzl View Post
I always wondered if our vehicle programming could take advantage of higher Cetane fuel (~50 ish)

Sent from my MB525 using Bimmer App
I know it is supposed to change for lower cetane. I remember reading about it within the BMW provided information back when I was researching fuels and cetane. That was 3ish years ago so I do not remember where I read that but I do know it was from BMW.
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  #30  
Old 02-18-2013, 05:02 PM
gulfcoastbeemer gulfcoastbeemer is offline
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Location: Gulf Coast
 
Join Date: Feb 2013
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Mein Auto: BMW 335d
Quote:
Originally Posted by Pierre Louis View Post
I agree, but without additives. The same car as you too - a Mercedes E320 CDI that exceeded the EPA estimates. I would get 43 mpg at 65 mph on flat land for a car rated at 37 highway in the more optimistic era before they made the "correction" on the newer models.

PL
Pierre, does the attached photo look familiar?

That photo of the MPG display was taken during a trip last summer in my '06 M-B E320 CDI. See, I am an over-achiever.
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  #31  
Old 02-18-2013, 06:02 PM
Pierre Louis Pierre Louis is offline
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Quote:
Originally Posted by gulfcoastbeemer View Post
Pierre, does the attached photo look familiar?

That photo of the MPG display was taken during a trip last summer in my '06 M-B E320 CDI. See, I am an over-achiever.
Whoa, that is good! May be that cetane improver working!?!

PL
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Rose Castorini: I just want you to know no matter what you do, you're gonna die, just like everybody else.
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  #32  
Old 02-18-2013, 06:07 PM
gulfcoastbeemer gulfcoastbeemer is offline
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Quote:
Originally Posted by Pierre Louis View Post
Whoa, that is good! May be that cetane improver working!?!

PL
Stanadyne Performance Formula 4 oz / 15 gal. -- that or, I was driving downhill for the last 135 miles.
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  #33  
Old 02-18-2013, 07:47 PM
Pierre Louis Pierre Louis is offline
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Originally Posted by gulfcoastbeemer View Post
Stanadyne Performance Formula 4 oz / 15 gal. -- that or, I was driving downhill for the last 135 miles.
Stanadyne may be one of the few good additives, but you may have had a tail wind!

PL
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