Keith Browning Posted January 25, 2014 Share Posted January 25, 2014 With the second arctic cold wave I had a lot more tow-ins to deal with again. I have always wanted to take a fuel sample and stick it in the freezer at home to see what would happen. Well, I have finally done it. I filled one of my test tubes and stuck it in the freezer right next to my Jaagermeister. It looks like about 20% at the bottom of the test tube had wax crystals then we shook it up. I want to see if it resettles. I'll take some pictures of it when I get it like that again. It's not earth shattering but it is neat to see it up close and clear.... not that a filter plugged up with paraffin is difficult to see either. Quote Link to comment Share on other sites More sharing options...
Matt Saunoras Posted January 25, 2014 Share Posted January 25, 2014 I've wanted to try this also with some fresh pump fuel and ones with various additives. From what I understand too much additive can actually increase the pour point of the fuel. Quote Link to comment Share on other sites More sharing options...
Alex Bruene Posted January 27, 2014 Share Posted January 27, 2014 I did that on Friday. I had a recently (2 days ago) delivered F-750 towed in. It was built in September, and was still on the original fuel that it came from (our sales department can be a bit cheap, and don't necessarily fill the fuel tanks). I imagine it wasn't any sort of winter fuel, especially being a Mexican truck. I took a sample and put it outside in the cold. I also took another sample of the same fuel and added a very small amount of anti-gel to the fuel and placed them side by side. The fuel without the anti-gel clouded up in under an hour, where the sample with the anti-gel remained clear. I suppose if the fuel were topped off with winter fuel, there would have been no issues. Quote Link to comment Share on other sites More sharing options...
dieseldoc Posted January 29, 2014 Share Posted January 29, 2014 I have always wanted to do this with a control and one of each additive on the market and see what actually happens and how they actually work. However I am married and my wife does not feel it is a wise use of freezer space. However this time of year in north dakota outside is the best freezer out there. Todays high temp was -4 F. Perhaps I will have to give this a try as I will be stuck at home next week, to help my wife recover and take care of our new baby. Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted January 29, 2014 Share Posted January 29, 2014 Congratulations! Quote Link to comment Share on other sites More sharing options...
dieseldoc Posted January 29, 2014 Share Posted January 29, 2014 Thank you sir. Is our first one, not to sure I am ready for this expedition. But everyone says you never are, so we will just take it day by day Quote Link to comment Share on other sites More sharing options...
batmantech Posted January 29, 2014 Share Posted January 29, 2014 Congratulations on the baby! Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted January 29, 2014 Author Share Posted January 29, 2014 It's funny, I tried to photograph the test tube with the fuel in it and by the time I get it set up in my photo "studio" the glass frosts over. I may need to move that operation outdoors or into the garage. Quote Link to comment Share on other sites More sharing options...
Alex Bruene Posted January 29, 2014 Share Posted January 29, 2014 These are the two sample jars I collected... I left them outside overnight flipped them up side down... Can you guess which one has anti-gel in it? Quote Link to comment Share on other sites More sharing options...
Matt Saunoras Posted January 29, 2014 Share Posted January 29, 2014 My truck froze up this morning with the proper amount of PM-23 in the fuel. Couldn't make one hill, truck shut off, primed it a could times, got it going and went a different way without hills. Quote Link to comment Share on other sites More sharing options...
Fordracer Posted February 7, 2014 Share Posted February 7, 2014 We just had another cold snap with temps dropping below zero and had the usual gelling trucks coming in. I had a 6.4 come in and for shits and giggles I put a pressure gauge on it and running it would stay above 6 lbs, even under a load but with koeo it would start out at 4 psi and slowly drop to 4 inches of vacuum. With the key turned off it would hold the vacuum until you turned the key back on and it would go the 4 psi and drop to a vacuum again. After sitting in the shop for an hour it would go to 6 psi koeo and stay there. I don't understand how it would create a vacuum when you check the pressure down stream of the electric fuel pump. Quote Link to comment Share on other sites More sharing options...
amailloux Posted February 7, 2014 Share Posted February 7, 2014 The back portion of the high pressure pump is a transfer pump. I've had them drive in with no lift pump operation at all, they just don't like it. Quote Link to comment Share on other sites More sharing options...
Fordracer Posted February 7, 2014 Share Posted February 7, 2014 The back portion of the high pressure pump is a transfer pump. I've had them drive in with no lift pump operation at all, they just don't like it. It was pulling a vacuum with the engine off. Quote Link to comment Share on other sites More sharing options...
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