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mistersausage t1_ja66jjq wrote

Reply to comment by Ng3me in Is this an oil leak? by Ng3me

Fuel oil is not flammable, just like diesel. You can throw a match in and it won't ignite.

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signifywinter t1_ja6m9sq wrote

Fuel oil and diesel are actually the exact same thing, but two minor, yet key differences:

  • Fuel oil is not taxed for road use and it has red dye in it to indicate if it’s improperly put into vehicles to skirt taxes.

  • Historically, diesel used to have more strict requirements when it came to sulfur content than fuel oil. Fuel oil used to have >=2,000ppm sulfur in it and increasing standards mandated diesel at be low sulfur at 500ppm. Ultra low sulfur diesel then was mandated at 15ppm. At this point, everything is ultra low sulfur.

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