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1st I've heard using STP in diesel fuel


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Today I filled the Dodge and while I was there a guy walked up and asked about the 2 stroke oil I was pouring in the fuel tank. During the discussion, he whipped out a jug of STP and poured it down his fuel tank then started filling. He said he heard of the 2 stroke and why people used it, but he preferred STP instead. He mentioned it quite his truck engine, lubed the fuel system and he has been using it for a while. (he said his dodge is a 2002). I have searched all I could on this, even the info here and 2 other sites: http://articles.mopar1973man.com/general-cummins/36-fuel-system/68-hfrr-testing-of-common-diesel-fuel-additives and I have yet seen a test on STP in diesel fuel, or even someone doing this. Anyone heard of this ? Used it ? Test results ?

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I never seen this guy before, and I never heard of this. He seemed like he was somewhat educated, but it could have been a good front.

I've never seen this before, and have been on the web ever since. So far I cannot find anything about this.

I wouldn't believe this if I didn't actually see it being done. As thick as that stuff is, I'd be leery, even doing a test on it.

--- Update to the previous post...

I guess it doesn't matter, STP doesn't even make the product now days.

Where ever he got the containers must be limited. It was the old STP I haven't seen in 20+ years.

But it was strange.

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Oh you mean the one with kerosene, moth balls, and xylene paint thinner? http://www.chemcas.com/msds112/cas/1772/8008-20-6_64742-94-5_91-20-3_25551-13-7_1330-20-7.asp Not good for your fuel system at all... :ahhh: I've got all these chemicals in my garage but I sure not going to dump it in the fuel... Kerosene is already dry fuel with low lubricity and high cetane number and low BTU content... The top it with a mix of Xylene paint thinner which is a very flashy fuel extremely low BTU content... Then to make it more fun benzene is a cancer causing chenical. You can look all this up over here... http://en.wikipedia.org/wiki/Xylene http://en.wikipedia.org/wiki/Naphthalene http://en.wikipedia.org/wiki/Benzene http://en.wikipedia.org/wiki/Kerosene What is wrong here is there is nothing here to lubricate the fuel system you are striping all the lubricate from the fuel system and causing much more harm than good. Even Bosch says the HFRR score of fue should be below 450 HFRR and today fuel is ~520 HFRR so adding a injector cleaner is not good... :banghead:

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I never seen this guy before, and I never heard of this. He seemed like he was somewhat educated, but it could have been a good front.

I've never seen this before, and have been on the web ever since. So far I cannot find anything about this.

I wouldn't believe this if I didn't actually see it being done. As thick as that stuff is, I'd be leery, even doing a test on it.

--- Update to the previous post...

I guess it doesn't matter, STP doesn't even make the product now days.

Where ever he got the containers must be limited. It was the old STP I haven't seen in 20+ years.

But it was strange.

You mean STP oil treatment like Richard Petty used to promote. I thought they still made that and assumed that was what you were talking about. To borrow a phrase from you "I am confused now". I cant believe as thick as that stuff is i could have xeylene kerosene or moth balls in it.
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You can't judge by how thick it is. It makes sense but it just doesn't live up to it's thick properties sometimes. For instance, looking here http://articles.mopar1973man.com/general-cummins/36-fuel-system/68-hfrr-testing-of-common-diesel-fuel-additives we see that motor oil does basically nothing for lube. It is 2 better than regular diesel. I don't know how much thicker you can get than motor oil. Kinda scary though since we rely on that to lube the engine. But whatever it does in the fuel makes it a crappy additive. Then we have biodiesel, best lube out there, yet it's also a solvent :wow: However, we have no data on the STP so who knows, other than it has stuff we don't want in it. Shoulda asked him how many VPs hes been through.

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It was the stuff I've seen in the 70's that was thick and used for oil treatment. He oozed a blob in the tank and flushed it with the nozzle. It amazed me seeing this. But in the STP website, it has nothing on this stuff and I really haven't seen it in years. When I googled it, all I could find about it was on ebay.

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It just caught me off guard, I just never read of anyone using this in their fuel tank. But he was comfortable in doing it.I've googled every way I could to find out if this is or can be used as a diesel additive and found nothing as of yet. Like I said, it just caught me off guard.

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It was the stuff I've seen in the 70's that was thick and used for oil treatment. He oozed a blob in the tank and flushed it with the nozzle. It amazed me seeing this. But in the STP website, it has nothing on this stuff and I really haven't seen it in years. When I googled it, all I could find about it was on ebay.

This is why I looked up the oil treatment. That stuff is thicker than snot. I think I used in some of the old beaters I drove.
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