Didnt i already say something about this...

Synthetics dont burn off as soon as mineral oils do. they can get several hundred degrees hotter than mineral oils before they start to smoke. when they smoke, they break down and leave carbon deposits, and thats what breaks shit... when the oil breaks down it thins out...at least standard weight oil. when you get the multigrade oil, it thickens as it gets hotter. the molecules space out father apart, and get locked together w/ the other hydrocarbon chains and make the liquid thicken up... its like when water starts to free, and ice crystals start to form, and grow... the ice crystals start to snag on eachother and it turns into a slushy; it gets thicker than normal water. same idea behind multigrade.

the difference between the synthetic and mineral based oil is just that one will be able to endure higher heat and for a longer period of time than the other. its cuz of them longer, more complex hydro-carbon chains... it takes more thermal energy to break apart the bonds... its not like a chain chain... its like a chain where each link is connected to several other links...the more links, the more energy it takes to break the bonds... thus, synthetic has more bonds than mineral oils, simply cuz man made them that way. since the man made the oil... hes gona stick it to us and try to keep a brotha down by charging like $5/quart.