by plumbbob »
Thu Mar 05, 2009 7:59 pm
Generally the two types of oil used in probably most heating are 28 sec and 35 sec. The second scale is Redwood No 1 and refers to the speed in which the oil if poured will spread over a given area.
28 sec which is most common for domestic use is also referred to as "Kerosene" or "burning oil".
35 sec is more often used in large domestic or commercial heaters and is also called "gas oil". This oil has the same specification as vehicle diesel, so is also used to power farm vehicles and boats. To differentiate between this fuel and the one used in your motor which includes an extra contribution to Mr Brown's pocket, a special additive is well, added. Hence its other name - "Red diesel".