Wasn't in much of a mood to fly last night so I took a panzer and went hunt trucks. While looking for trucks to kill I managed to kill a few P51s, couple of 109s and 190s, and even force fed a 75mm AP to a low alt B26 that couldna hit me with his bombs

Found a road, drove away from the town it led to, found a nice long straight I could see a good ways down and parked, right in the middle of the road. While waiting on the convoy to show up a 190 decided to give me a free kill with a kamikaze attack, slamming into the ground right next to me and taking out my pintle gun and main turret in the process.
So I sit and wait, figuring I'll just see what happens when the trucks come along and I man the hull mg. Few minutes later here come the trucks and I start shooting the lead truck. Spent about half the ammo for the hull MG before the truck got to me. When the truck got to me it went through my tank, making it rock a couple of times before exploding it and sending me back to the tower.
Whiskey Tango Foxtrot?!? A truck can drive through a panzer? Must come from the same place as the panzer killing trees. What's with a supply truck (duece and a half?) driving through a panzer and blowing it up? I was hoping, at best, that the trucks would stop with me in the way. Never even thought that I'd die due to being rammed by a truck.
Get a new tank, drive back out to the road, park off to the side. Here come the trucks, jump to the main gun, see I only have AP loaded but thing "hey, they're on trucks, right?" and proceed to fire. Good hit, right in the middle of the front grill, truck keeps rolling on. Fire another shot that hits just above the trucks right front tire and it keeps rolling on. Score a 3rd hit on the cargo area as the truck gets to my position and it keeps rolling.
Whiskey Tango Foxtrot?!? These are TRUCKS! A 75mm AP through the front should stop that truck that cold!
Then a 110 (I think G2) comes along, makes ONE strafing pass on my panzer, and sends me back to the tower.
Get a new tank, this time with HE rounds, and drive back out to the road. Here comes the convoy. Jump to the main gun, select HE, lay a bead on the lead truck, fire.... BOOM! no more truck. Reload, target, ready, FIRE.... BOOM! no more truck. Get off a 3rd shot as the convoy nears my position, then a 4th after rotating the turret and manage to catch the last one in the line as it disappears over a hill. While waiting on the next convoy the B26 came along, dropped a bomb and knocked off a track, reattacked and missed completely, came back on a couple of strafing passes and on his second strafing pass ate a 75mm AP round

Now, basically, it seems that to interdict base supply convoys with panzers you need a force of at least 3 panzers loaded with HE shells and don't park on the road. Seems a little strange for a tank to be scared of trucks though...