Fuel tank selector valve…………..

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   Acted up the other day on the ‘91 F-350 7.3L IDI. For a day, was drawing fuel from both tanks. This following about 6 weeks adding a small bottle 2-cycle oil at every fill-up to aid with pump lubrication while pulling that heavy camper across the country.
My question is; is the 2-cycle oil being added to diesel cause the pistons in the selector valve to get ‘sticky’ and possibly ‘hang up’?

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Lars(wi) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 14 Sep 2009 Location: Permian Basin Points: 8171	Post Options Post Reply Quote Lars(wi) Report Post Thanks(0) Quote Reply Topic: Fuel tank selector valve………….. Posted: 2 hours 37 minutes ago at 6:27am
	Acted up the other day on the ‘91 F-350 7.3L IDI. For a day, was drawing fuel from both tanks. This following about 6 weeks adding a small bottle 2-cycle oil at every fill-up to aid with pump lubrication while pulling that heavy camper across the country. My question is; is the 2-cycle oil being added to diesel cause the pistons in the selector valve to get ‘sticky’ and possibly ‘hang up’?
	I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.

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DMiller Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 14 Sep 2009 Location: Hermann, Mo Points: 34501	Post Options Post Reply Quote DMiller Report Post Thanks(0) Quote Reply Posted: 2 hours 4 minutes ago at 7:00am
	Two Cycle Oil is not meant for Diesels, may be a lubricant in two stroke engines, is actually too Viscous even diluted for Fuel Injection Systems. Same issues were found using filtered Waste Engine oils to fuels as a Extender and to consume the waste. Simple Answer Yes. BTW, significant add on, for those adding ATF to fuel tanks for Lubricity, is perfectly fine on OFF Road machines, for on Highway is NOT as the materials in ATF can foul all manner of Emissions devices if have not been dealt with, as well using previous version that are RED, the chances of being caught as use of AG Diesel on Hwy. becomes more prevalent. Friend of ours had 'Treated' his Home Tank of ON Hwy Diesel with ATF, delivering agent noted was RED in Color and cautioned to deaf ears, was a Spot Check at a Grain delivery site and he was TICKETED for Dyed Fuel, truck was placed OOS until the Fuel supply was fully cleaned and cleared. And NO, there is NO test that can confirm was Not AG Fuel. ALL Diesel comes from same truckloads, Dye is added as Complete AG tank Fillings.

PaulB Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Rocky Ridge Md Points: 5165	Post Options Post Reply Quote PaulB Report Post Thanks(0) Quote Reply Posted: 1 hour 37 minutes ago at 7:27am
	If anyone wishes to a a lubricant to Diesel fuel, especially ON Highway fuel, They should use a product specifically for ON Highway fuel such as PowerService injector cleaner. This is the only product that is made by a diesel engine company. There is also a comparable Standyne product made by a Diesel injection products company. These products are "water clear" and won't be an issue when spot checked, which any diesel vehicle driven on the highway is subject to. Oils of any kind could have enough dye of any color that would be detectable in a test. Anything else I'd consider to be snake oils or homebrews which may work just fine for some and create big problems for others. I would also only use the above products in OFF ROAD fuels as homebrews are like playing Russian Roulette. Having been a bulk transporter of fuel for many years starting before the introduction of ULSD, I have encountered first hand the complaints from those that tried to save a penny with their own homebrews for lubication when the sulfur started to be removed from diesel fuel. However anyone is welcome to use whatever they like, DO YOU FEEL LUCKY? Edited by PaulB - 1 hour 35 minutes ago at 7:29am
	If it was fun to pull in LOW gear, I could have a John Deere. Real pullers don't have speed limits. If you can't make it GO... make it SHINY

Lars(wi) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 14 Sep 2009 Location: Permian Basin Points: 8171	Post Options Post Reply Quote Lars(wi) Report Post Thanks(0) Quote Reply Posted: 1 hour 31 minutes ago at 7:33am
	I chose the 2-cycle oil as hopefully finding a pump lubricant that is also designed to ‘burn, unlike atf or used engine oil that is not intended to ignite. I will give it a couple fill-ups without adding anything and see if the issue clears itself.
	I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.

Lars(wi) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 14 Sep 2009 Location: Permian Basin Points: 8171	Post Options Post Reply Quote Lars(wi) Report Post Thanks(0) Quote Reply Posted: 1 hour 14 minutes ago at 7:50am
	I remember when ‘dyed’ off-road fuel concept first it the market. Some was red, some was blue, the blue diesel didn’t last long because of the potential of being mistaken for aviation fuel, that was(at the time tinted blue). Some loading facilities were slow to install the dye injection equipment at the racks, so we had to splash blend the dye. At first we could add the fuel at the customers tank, then we had loading facility personnel witness us dumping the dye in the compartments of the tankers at the facility. The fun times.
	I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.