can please someone explain the difference? it was once said that that the dexos 2 was for diesel but its not really only for it,in europe they recommend it,in the states with the new corvette as well, i go to any companys oil selector and they recommend dexos 1 but also the 2(mazda cx5 g). so my question is basically what to use,i understood that the the 2 is more robust then the 1,what else is the difference,and if its for a familiy car will there be any benefit with one over the other?can there be a downside or even worse when using the 2 over the1? doind mostly very short city trips. tnx a lot.