How much oil do i order?

There is often a lot of confusion when it comes to  how many gallons of oil to order.  The first thing to do is look at your tank's gauge, keep in mind the average tank size is 275 gallons.  Many people would think that if their tank reads 1/2 full then around 135 gallons should fill it up.  However, between air and debris being at the bottom of the tank it simply will not accommadate exactly 275 gallons of oil.  This is completely normal and below is a picture and chart of when to order oil and how much.