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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > Diesel fuel additives



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      12-17-2013, 12:35 PM   #23
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Quote:
Originally Posted by Puerto Rican 335d View Post
Quasimodem what you might of experienced was soot been removed from the system I didnt use AMSOIL products for a month and when I came to it I got a limp mode just before the half mile race we clocked twice at 150 mph (at the end of the 3/4 mile) and the car even ran smoother after that, my girlfriend even noticed that the car was more loose than before. This has been the ONLY time I have gone ACTUAL LIMP mode in 3 yrs of ownership and with the RENNtech flash
Actually it was the Power Service stuff I was using (I edited my post above). I do not know what my starting "thump" was. It was not very loud, but it was noticeable. It may not have been bad at all. But I wasn't expecting it and I hadn't read anything about it on the label of the additive, so I backed off using it. Maybe I will try using the additive in every other tank and see if the sound comes back.
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      12-17-2013, 01:09 PM   #24
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Interesting, but somewhat religious discussion.

Drove a loaner 328d the other day. In addition to the "Low-Sulfur Diesel" notice on the fuel cap, there is a prominent "No additives" warning printed around the fuel filler. The manual also has a warning similar to the 335d's manual.

Wonder why BMW is so serious about this?
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      12-17-2013, 01:15 PM   #25
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Quote:
Originally Posted by floydarogers View Post
Interesting, but somewhat religious discussion.

Drove a loaner 328d the other day. In addition to the "Low-Sulfur Diesel" notice on the fuel cap, there is a prominent "No additives" warning printed around the fuel filler. The manual also has a warning similar to the 335d's manual.

Wonder why BMW is so serious about this?
God forbid they don't get a post-warranty payout of $15k for replacing the entire top end due to CBU.
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      12-17-2013, 01:20 PM   #26
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Originally Posted by stevers314 View Post
God forbid they don't get a post-warranty payout of $15k for replacing the entire top end due to CBU.
ROFL
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      12-17-2013, 02:12 PM   #27
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Im intrigued some of us use it some dont I am curious as to what not effects, my car is running excellently but who knows maybe im setting myself to be FAULKED, but i doubt it, I'll stick to my guns!!
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      12-17-2013, 06:22 PM   #28
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Quote:
Originally Posted by Puerto Rican 335d View Post
Im intrigued some of us use it some dont I am curious as to what not effects, my car is running excellently but who knows maybe im setting myself to be FAULKED, but i doubt it, I'll stick to my guns!!
All our cars, and us, will eventually grind to an end and die ... Merry Christmas everyone :-)
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      12-17-2013, 07:14 PM   #29
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Quote:
Originally Posted by stevers314 View Post
God forbid they don't get a post-warranty payout of $15k for replacing the entire top end due to CBU.
Quote:
Originally Posted by TDIwyse View Post
All our cars, and us, will eventually grind to an end and die ... Merry Christmas everyone :-)
Lol. Definitely the posts of the day.
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      12-17-2013, 07:32 PM   #30
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Quote:
Originally Posted by TDIwyse
Quote:
Originally Posted by Puerto Rican 335d View Post
Im intrigued some of us use it some dont I am curious as to what not effects, my car is running excellently but who knows maybe im setting myself to be FAULKED, but i doubt it, I'll stick to my guns!!
All our cars, and us, will eventually grind to an end and die ... Merry Christmas everyone :-)
I was hoping that the 335d and I would be taken to the junkyard on the same day, and not because of a fatal accident. It varies from day to day, but it looks so far like I'm winning the race. But with all the negative posts the D may still eke out a victory.
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      12-18-2013, 08:57 AM   #31
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LOL 335dFan
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      12-18-2013, 04:40 PM   #32
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I started using the PS Gray this past summer every other tank or so. I get 3-4 more mpg with the additive, pretty significant change for my car. I switched to the PS white this last tank because it got down in the 20s these past few weeks just in case. With the carbon issues we have I am hoping it will help some, plus my JBD. Who knows if it will help long term but it helps my mpg and more cetane is never a bad thing. I have noticed a pretty big difference in diesel fuel quality in my area so I will continue using it every other tank or so.
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      12-18-2013, 06:27 PM   #33
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Quote:
Originally Posted by '02onthebrain View Post
I started using the PS Gray this past summer every other tank or so. I get 3-4 more mpg with the additive, pretty significant change for my car. I switched to the PS white this last tank because it got down in the 20s these past few weeks just in case. With the carbon issues we have I am hoping it will help some, plus my JBD. Who knows if it will help long term but it helps my mpg and more cetane is never a bad thing. I have noticed a pretty big difference in diesel fuel quality in my area so I will continue using it every other tank or so.
I love the additive for what it does, but it cannot improve my winter mileage when 10 minutes a day is spent warming up the car.

It goes up to 35mpg in the summer and down to 22-23 in the winter. Now if I was actually to do a road trip more than 15minutes this would vastly improve, but it's not the normal for the car.
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      12-19-2013, 02:30 PM   #34
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Quote:
Originally Posted by Vreimann View Post
I love the additive for what it does, but it cannot improve my winter mileage when 10 minutes a day is spent warming up the car.

It goes up to 35mpg in the summer and down to 22-23 in the winter. Now if I was actually to do a road trip more than 15minutes this would vastly improve, but it's not the normal for the car.
I will see if the PS white helps my winter mileage at the next fuel up. It certainly helped in the summer and pretty significantly when doing highway miles. I was surprised.
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      12-19-2013, 05:30 PM   #35
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Quote:
Originally Posted by '02onthebrain View Post
I will see if the PS white helps my winter mileage at the next fuel up. It certainly helped in the summer and pretty significantly when doing highway miles. I was surprised.
Don't be. Additives don't improve mileage. You'd have to do a study to actually show it anyway. Your car may be cycling through its DPF or something else like your driving style changes.

http://www.akenergyauthority.org/PDF...0Additives.pdf

Last edited by Pierre Louis; 12-19-2013 at 05:42 PM.
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      12-19-2013, 06:01 PM   #36
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Quote:
Originally Posted by Pierre Louis View Post
Don't be. Additives don't improve mileage. You'd have to do a study to actually show it anyway. Your car may be cycling through its DPF or something else like your driving style changes.

http://www.akenergyauthority.org/PDF...0Additives.pdf
Well, saying "additives don't improve mileage" is too broad. Here's a study done by SwRI...

http://www.swri.org/

"Southwest Research Institute® (SwRI®), headquartered in San Antonio, Texas, is one of the oldest and largest independent, nonprofit, applied research and development organizations in the United States."

...showing an example of an additive that does. Study paper shown in link below.

http://greenmyfleet.com/index.php?op...ves&Itemid=119

They followed SAE J1321 protocols with straight D2 and then repeated with the test additive in the same fuel. Average fuel efficiency improvement was just over 3%.

So ... some additives can and will improve efficiency.
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      12-19-2013, 10:44 PM   #37
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Quote:
Originally Posted by Pierre Louis View Post
Don't be. Additives don't improve mileage. You'd have to do a study to actually show it anyway. Your car may be cycling through its DPF or something else like your driving style changes.

http://www.akenergyauthority.org/PDF...0Additives.pdf
The only major thing I have noticed from the additives is that I don't really have regens anymore.
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      12-20-2013, 03:03 AM   #38
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Quote:
Originally Posted by TDIwyse View Post
Well, saying "additives don't improve mileage" is too broad. Here's a study done by SwRI...

http://www.swri.org/

"Southwest Research Institute® (SwRI®), headquartered in San Antonio, Texas, is one of the oldest and largest independent, nonprofit, applied research and development organizations in the United States."

...showing an example of an additive that does. Study paper shown in link below.

http://greenmyfleet.com/index.php?op...ves&Itemid=119

They followed SAE J1321 protocols with straight D2 and then repeated with the test additive in the same fuel. Average fuel efficiency improvement was just over 3%.

So ... some additives can and will improve efficiency.
Although this study was done neatly, it is not double blind and it has only two trucks tested with and without additive, plus a "control" truck. Just driving style alone can account for the 3% especially if you know there is additive in there. We really don't know what the expected variance (variability) is but the first bar graph, if accurate, tries to tell us.

I suppose one might make the argument that fuel with additive will trigger less often the efficiency-robbing pollution device activity (EGR, DPF regen, etc.) when used properly. The amount of NOx and soot, for example, may affect efficiency, hence the additive helps indirectly. But this is on pre-DPF tech in 2004, on non-ULSD fuel, so its not representative of possible current findings.

Good try though.
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      12-20-2013, 08:42 AM   #39
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I guess they have to do one with DPF then but I will stick to my AMSOIL anyway
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      02-28-2014, 05:03 PM   #40
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Lubro Moly Diesel Purge, made in Germany, any thoughts?
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      02-28-2014, 08:08 PM   #41
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I use liqui-muscle every so often during fillups in my car. It's made for heavy duty trucks so I only add a couple of millilitres of it at once
Haven't noticed anything major but I use it just knowing something good is happening from
It
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      02-28-2014, 08:29 PM   #42
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Quote:
Originally Posted by Puerto Rican 335d
I guess they have to do one with DPF then but I will stick to my AMSOIL anyway
Pretty Sure that AMSOIL is repackaged Stanadyne; though it is very good stuff and recommended by many diesel pump shops.
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