Been told my a synthetic oil mfg (name witheld) tech dept rep that shelf life for their synthetic 2 cycle oil was 5 years unopened and 3 years once bottle opened. Another rep from Castrol (my uncle) told me petroleum 2 cycle oil = forever. How true ... donno.Does XD50, XD100, regular TCW3, the oils we use for OBs, Does this oil have a shelf life?
well the oil was millions of years old when it was pumped, refined, and bottled so you would think it would last for ever but not so. I have to go to Phillips 66 training every year (i'm in aviation) and i asked this same question. the reason most oils have a shelf life of only 2 1/2- 5 years isn't beacuse of the oil that is millions of years old breaking down, it is because of the break down of all of the other chemical additives in that oil that give it it's high tec lubricating properties. but if in question if it is still good dont chance the life of your engine to a $4 bottle of oil. also you don't have to throw away that oil, it works great in your chain saw as bar oil.
Sounds right ... oil = forever ... additive = nope ... I buy that LOLwell the oil was millions of years old when it was pumped, refined, and bottled so you would think it would last for ever but not so. I have to go to Phillips 66 training every year (i'm in aviation) and i asked this same question. the reason most oils have a shelf life of only 2 1/2- 5 years isn't beacuse of the oil that is millions of years old breaking down, it is because of the break down of all of the other chemical additives in that oil that give it it's high tec lubricating properties. but if in question if it is still good dont chance the life of your engine to a $4 bottle of oil. also you don't have to throw away that oil, it works great in your chain saw as bar oil.