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What "3rd tank"? Is this an auxiliary tank in the bed or something? Did you just buy this truck? There's a strong possibility the PO used the aux tank for off-road diesel, and if it's mixed with undyed road diesel it might look orange.
Not sure if bio-diesel has a color to it, never seen bio-diesel. Off road fuel has dye added to it to distinguish it as off-road, meaning that it doesn't get taxed like highway fuel does. I've only seen red dye used in off road fuel but, it could have been orange or degraded/diluted from red to orange.
Color of bio probably depends on the source oil species. Some veg oils are yellow-ish. That mixed with red-dyed off-road fuel would most likely turn orange.
at some mix rates it can look orange, I haul the stuff, and purge back and forth between dyed and clear all the time, (that's what we call on road diesel,clear) filter it through an old sock and burn it, your truck will burn blends up to 100% tranny fluid, with out a problem, just don't burn more than 5% gas, and you will be ok. if it is oil it will burn it.
WVO would smell like used fryer grease (i.e. the food that was fried in it). Biodiesel made from some "virgin" seed oil would not. And it's all gonna be oily, whether it's bio, WVO, dino or some mix. So what _does_ it smell like?
To my color perception, that's more "golden" than orange. Even a little green tinge where it's thinner, filling the handle. I'm guessing it's a mix of dino-diesel and some seed oil, soybean or something.
So I work for a fueling company and this is not all that uncommon to see. Usually this is a combination of bio diesel and clear diesel mixed. Bio is usually brown ish and clear has a blue/green tint to it. Mix the two together that's usually what you get. If it is the mixture then it is perfectly safe to use. It's pretty easy to tell if its straight diesel. Keep it in your milk jug for a day and see if there is any separation if not then you are safe. Most other patrolium and or oil based products separate when mixed. It wouldn't be a red/clear mix tho even at its most diluted it turns to a more florecent pink color then anything. All that being said adding it in little by little is probably a good idea if your not sure.
Thanks. It has been in the jug for a week. I wanted to make sure there was not water in the fuel. I will mix a gallon in with my next 3 fill ups and then drain my fuel filter in case I picked up some water I did not see. Next I need to drain the rear tank an repair the fuel pick up.
Algae will only grow in the presence of water, it grows only in the water, and when it dies, it then floats in the diesel, and is not harmful except it plugs up fuel filters. does not change the color of the fuel. mostly you find it in ships, that fuel every 3-4 months or ships that have been moth balled, the tanks are 40-80 thousand gallons, or larger, usually measured in tons of fuel, and the bottom 6,000 gallons is below the fuel pick up. some have water removal systems that pump off the very bottom of tank, normaly ships burn Bunker oil, or also called diesel #6, made from trans mix, (flushed, from pipes at refinereys when changing fuels in tanks, or pipe lines) reclaimed oil and tranny fluid, and other buy products of oil industry.
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