Re: Shelf life of motor oil?
Filtration is key. As oil comes out of the ground after being there for millions of years,it has all the "goodies" in it and then some. Its all under pressure as we have seen an example off shore in the Gulf of Mexico. The crude oil is taken to the refinery where it is "fract" or cook. From this crude oil comes propane,natural gas,white gas,kersonse,avg gas,jet fuel,gasoline,diesel,motor oils,addivites,gear oils,waxes,road tar and burner,I problary miss a few. We go out to the oil patch and as drivers ,we tested the oil for purity and purchase it by writing out a bill of sale.If the oil has "free" water it will be at the bottom of the tank as water is heavier than oil. However,water can be mixed or homogus with oil. This takes a disperant to break down the oil/water molcules.Sometimes the water will fall or pecicapate to the bottom of the tank where it can be pull off with a pump.Other times it takes heat. This is what they are doing on the "Big" oil spill,to disperperse the oil.which in my humble opoion is wrong,oil is more collectable when bunch up. Yesterday I went to a self contained oil well site,when a large compressor motor has run ten,yes ,ten years with out a oil change. By pulling oil samples form the motor and changing oil filters on a regular basics,this was acheived. By the way,I got an idea as to pluggging the run away oil well,any takers?