Mattijah, if your car doesn't burn oil (a negligible amount anyway) and you change your oil every 3K miles or 90 days (whichever comes first), then is there much of a benefit. Like I posted earlier, I realize it is better with reagards to thermal breakdown and superior lubrication properties, but with the above stated scenario would I REALLY benefit from synt. Oil and gas are not my life so I would love for you to teach me the ways of the dead dinosaurs (or testubes)
By the way.....Quiz: What does the "w" stand for in 10W40?
Autotechnica: Comparing the two (given the same viscosity) I don't think there is much of a difference in thickness, hence the same weight rating.