[lowfighter]

Well I think you don't notice that except when strafing and when they bump into each other and all trees and houses around, but it's also due to the fact that as they are driving close to each other if you kill a couple of them in a pass there's smoke and that's also reducing fps, especially those fuel columns, all of them when exploding, a lot of smoke. I place vehicles wider apart, looks better, also more difficult to kill a column... trafic jams are minimised too...
Had some hundreds of moving vehicles and tanks in some missions, but I wrote a little script in matlab producing the columns, with random number of vehicles and types.

oh man, is that right? individual cars making columns takes less pc power?

the truth is i never noticed. i always thought since the begining days of IL2 those columns of cars were very framerate friendly