it will run yes he is concerned about damage. I think a good rule is the Marvel mystery oil and Powerservice combination and try not to get into that situation. I agree the 55 gal. drums would be a good choice, get it delivered and get a 12v or hand crank pump to use. 55 gal drums are like $10 get them from a garage that buys motor oil in bulk.
About the old time deisel trucks that mixed oil and kero. Those engines are much diff than modern engines and they probly had like 10 gals of deisel left anyway. You can run a deisel on gas for a little while to long and not enough deisel mixed in and you'll melt the darn thing, dosent mean its good for it just because it will run on it.
I would try and have 55 gal drums on hand personally of off-road fuel.
Kero is in the $5-6 range a gal here too. How can you buy it for $3? our fuel i though was some of the cheapest in the nation here in SC Off road deisel is hovering around $3.30/gal, but i only buy 5 gallons every like 9 hours of tractor useage.