nn 6 ماه قبل

How much is waste oil worth?
 
 

And even with a slight efficiency disadvantage (75-80% used oil compared to 85-90% gas, 99% electric) waste oil heaters and boilers can make your used oil worth anywhere from $1.25 to more than $6.00 per gallon based on U.S. heating fuel and energy prices, depending on the fuel source it is replacing.