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Old 03-23-2016, 09:37 PM
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Diesel fuel additives

Just curious if anyone is running any diesel fuel additives on a regular basis? If so, what you running and why?

Sorry if this is a repeated thread, I tried doing a bit of searching and didn't really find anything. I found some references to different additives but all were side topics for different items.

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Old 03-24-2016, 07:36 AM
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Re: Diesel fuel additives

Here's some information on the topic: Diesel Fuel Additives
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Old 03-24-2016, 08:32 AM
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Re: Diesel fuel additives

Living in the southern US I was concerned about the quality of diesel fuel that was available on the market with cetane levels advertised just meeting minimum guidelines. I drive a lot of miles so I went through 5 full tanks of fuel from my usual fill-up place and kept records of miles per gallon. Then I purchased Stanadyne Warm Weather Blend diesel performance additive and ran another 5 tanks of fuel from the same fuel stop. The driving I did while running the 10 tanks was basically the same. I measured virtually no change between the 2 tests.

The additive maker advertised increased fuel efficiency plus greater lubricity (love that word) thus longer engine life. Since it didn't deliver on the first claim I figured it wasn't delivering on the second either although that may be short sighted on my part. I no longer use an additive.
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Old 03-24-2016, 09:38 AM
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Re: Diesel fuel additives

I only use it in the winter. The slight increase in cost is worth it to me to avoid dealing with any gelled fuel issues.
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Old 03-24-2016, 11:43 AM
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Re: Diesel fuel additives

Yes. Stanadyne Perfomance Formula and Lubricity additive on every fill. Using up the rest of my Amsoil Cetane boost too, but that probably isn't necessary as I don't think the Jeep utilizes the higher cetane like my old BMW 335d did, (even with the GDE tune.)

The Performance Formula from Stanadyne contains both a slight cetane booster and lubricity additive, and the lubricity additive is inexpensive insurance since it's relatively cheap. In the US, our diesel quality is inconsistent, and when they took out the sulfur so too went the lubricity.

The only good thing about B5 is that it restores most of this lubricity lost when we went over to ULSD. (Stay away from those new placards disclaiming that their diesel may contain anywhere from B5 to B20, they ought to be outlawed.)

Lubricity is crucial for the HPFP, and Stanadyne also helps protect diesel injectors. Just to be safe, I probably add about 2oz's lubricity to 4oz Performance Formula. I prefer Stanadyne because they primarily make diesel injectors, and I remember using it on an old 1990 Jetta diesel in college 20 years ago, but there are others out there, too.
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Old 03-25-2016, 02:38 PM
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Re: Diesel fuel additives

I'm sure some of it is snake oil, but at least with the Diesel Kleen I use, the difference is very easily HEARD at idle. what the implications of that are, I don't know.

Not a huge difference in mpg or noticeable power though, and its certainly not the cheapest among all the different additives...
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