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stanadyne making truck idle rough? #4461289
07/16/17 10:12 PM
07/16/17 10:12 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
After the last few tanks of my truck having a slight shake at idle, I decided to stop using the stanadyne lubricity formula I've been using since the truck was new and it pretty much went back to idling so smooth you can barely tell the engine is even running. Opinions?

I've heard low cetane diesel fuel can cause rough idle, but what are the chances of getting 3 or 4 tanks in a row?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: stanadyne making truck idle rough? [Re: motor_oil_madman] #4461291
07/16/17 10:14 PM
07/16/17 10:14 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
I do seem to recall it doing this after buying a new batch of the additive, is it possible they've changed the formula now vs back in 2007?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: stanadyne making truck idle rough? [Re: motor_oil_madman] #4461296
07/16/17 10:23 PM
07/16/17 10:23 PM
Joined: Feb 2013
Posts: 10,679
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline
Joined: Feb 2013
Posts: 10,679
Phoenix, AZ
Where do you get fuel? Is it at the same station all the time?


2015 Hyundai Sonata 2.4L 84k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 230k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: stanadyne making truck idle rough? [Re: motor_oil_madman] #4461308
07/16/17 10:39 PM
07/16/17 10:39 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
Usually it's murphys which I've never had a problem with, but nobody will change the fuel filter so I quit buying from them. I came back 3 weeks later and it was the same problem. You get idiots will sit their for 25 minutes fueling up their rigs pumping 1 gallon/minute.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: stanadyne making truck idle rough? [Re: motor_oil_madman] #4461310
07/16/17 10:41 PM
07/16/17 10:41 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
It doesn't make any sense that the lubricity additive could cause a shake right? The last couple tanks I've filled up at Valero since walmart has clogged filters.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: stanadyne making truck idle rough? [Re: motor_oil_madman] #4461358
07/17/17 12:21 AM
07/17/17 12:21 AM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
I guess the first step is to just go to a completely different station. I know their is a shell station that I fill up at when passing by that I have good luck with, but I only fill up there if I'm empty and happen to be driving by. No sense driving 5 miles away for fuel.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: stanadyne making truck idle rough? [Re: motor_oil_madman] #4461432
07/17/17 06:47 AM
07/17/17 06:47 AM
Joined: Jan 2017
Posts: 1,139
USA
ArcticDriver Offline
ArcticDriver  Offline
Joined: Jan 2017
Posts: 1,139
USA
I have never found any claim that Stanadyne caused rough idle in anyone's diesel.

I am not casting doubt on your own personal experience but maybe ruling out other possibilities is a good idea.

The suggestion to change your diesel fuel source is a good one.


Multiple Diesel and Gasoline vehicles
Re: stanadyne making truck idle rough? [Re: motor_oil_madman] #4461433
07/17/17 06:48 AM
07/17/17 06:48 AM
Joined: Sep 2016
Posts: 1,418
Minnesota
bioburner Offline
bioburner  Offline
Joined: Sep 2016
Posts: 1,418
Minnesota
I would checkout couple of the diesel forums for this additive issue. I know I am adding a bit of 2 stroke oil with some diesel service product for my 99 and Shaffers in the old van for decades. Since sulfur has been pretty much eliminated but my area we have at least in the summer a strong shot of biodiesel that helps with lubricity.
Diesel service had a good rebate that a member here posted.



97 Ford E350 D,99 F350 dually D
13 Scion Xb
12 Ford Transit Connect
06 Nissan Xterra
03 K1200 BMW
07 Kawasaki KLR650
13 Madass
Re: stanadyne making truck idle rough? [Re: bioburner] #4461442
07/17/17 07:14 AM
07/17/17 07:14 AM
Joined: Jan 2017
Posts: 1,139
USA
ArcticDriver Offline
ArcticDriver  Offline
Joined: Jan 2017
Posts: 1,139
USA
Originally Posted By: bioburner
I would checkout couple of the diesel forums for this additive issue. I know I am adding a bit of 2 stroke oil with some diesel service product for my 99 and Shaffers in the old van for decades. Since sulfur has been pretty much eliminated but my area we have at least in the summer a strong shot of biodiesel that helps with lubricity.
Diesel service had a good rebate that a member here posted.


Are you referring to Power Service Diesel Kleen products?

I fully agree on the bio-diesel and no harm with 5% Bio (B5) although your BioD is probably made from high quality soy and I am not sure the source in TX.


Multiple Diesel and Gasoline vehicles
Re: stanadyne making truck idle rough? [Re: ArcticDriver] #4461532
07/17/17 08:59 AM
07/17/17 08:59 AM
Joined: Sep 2016
Posts: 1,418
Minnesota
bioburner Offline
bioburner  Offline
Joined: Sep 2016
Posts: 1,418
Minnesota


Are you referring to Power Service Diesel Kleen products?


[/quote]
Yes.

I know there is different sources of the bio oil used. I have heard of the use of rendering plant for one source. Even the use of chicken grease. Had a friend plumb a boiler for its use.



97 Ford E350 D,99 F350 dually D
13 Scion Xb
12 Ford Transit Connect
06 Nissan Xterra
03 K1200 BMW
07 Kawasaki KLR650
13 Madass
Re: stanadyne making truck idle rough? [Re: motor_oil_madman] #4461540
07/17/17 09:14 AM
07/17/17 09:14 AM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
I always was concerned about the lubricity and not the cetane level. The diesel clean ups the cetane, but doesn't do much for lubricity.

Is this why I hear people say that the US has horrible diesel fuel? Frequently buying low cetane fuel?


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: stanadyne making truck idle rough? [Re: motor_oil_madman] #4461543
07/17/17 09:16 AM
07/17/17 09:16 AM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
I guess the rest now is add some stanadyne and see if the idle becomes rougher


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.


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