When the masked leader of the Mohawks addresses the compound the first time he is using a hand-held microphone making his voice louder. When he addressees the compound a second time his hands are raised in the air and is voice is just as loud as the first address but no microphone is in sight.
When the Gyro Captain ambushes Max and holds him at crossbow point, he is apparently unaware that his fingers are sticking well above the string level of the weapon, and that if he were to fire it, he'd lose top half of all his fingers. Max is oblivious to this as well, or knows that the crossbow would still harm him regardless of damage done to its user.
In the opening chase, after the black Ford Landau smashes the dune buggy, the roadside is clear around the "Mundi Mundi Look Out" [sic] sign. In the reverse shot, as the Landau starts to roll over, piles of debris (including the stunt ramp) can be seen near the sign.
In the bargaining chase scene, when the two villains cars crash one into the other, in the first shot the second car is moving but in the second shot you can clearly see that it's stopped when the first car hits.
During the final chase, the goons shoot out the tanker truck's rear, left-most tire (as seen from the back). In a subsequent shot, the first shot of the tanker following the gyro crash, all four rear tires are intact.
Wez is on the roof of the tanker spinning his chained spike-ball and Max hits the brakes. In the first shot, Wez is falling with his body turned to the right, but in the next shot, he falls with his body turned to the left.
When the Gyro Captain is reaching for the can of dog food that the dog is eating out of, it shows him reaching with his right hand, yet when we see the shot with the dog and the can, a left hand is seen reaching out for it. He is also holding a wooden spoon with that right hand which then is missing in the shot with the can.
In the opening scene, as the camera pulls "out" of the blower, the blower pulley is not turning (widescreen only). A few moments later Max shuts off the blower and the pulley stops turning (the implication being that it was running the whole time).
When Max takes Nathan back to the compound, the defenders confiscate his tool belt and weapons. Later, as Max is showing the music box to the Feral Kid, the tool belt's shoulder strap appears on his shoulder. It's gone in the next shot.
When Max takes Nathan back to compound, he holds up his tool belt in his right hand. The hatchet (wooden handle) is facing the camera. In the reverse shot, showing Max from behind, the hatchet is again on the camera side. The hatchet never faces away from the camera.
In the opening scene where Max is being chased at one time he
slams on his brakes, allowing one of the cars that chasing him to pass, he then hits the gas and rams the other car busting the plastic nose piece off of the Interceptor. During this scene if you watch closely there you can see the Interceptor with the smashed grill just before the impact and then with an undamaged grill after.
After Max mans the flamethrower and helps turn away the marauders, there's a brief shot of him looking back into the compound. This shot is from earlier, when he was cuffed to a railing. (The crossbow turret can be seen to his left.) The flamethrower turret is to the left of the crossbow, so the crossbow should be on his right.
After Max delivers the truck to the compound and escapes in his battered pursuit special, it goes from shots that are "dawn" lighting, (car escaping against lit dawn horizon & close-up of Max and engine with heavy orange gels) straight to a traveling shot along the highway where the shadows indicate a sun around a before/after noon position.
When the pink Desoto skids to a halt outside the refinery gate and gets torched, it's riding on oversized truck tires mounted on shiny chrome wheels. Every time it's visible on-screen after it explodes, it's wearing normal car tires with plain stamped-steel wheels.
Gyrocopters, or autogyros, do not fly like helicopters. The motor spins the propeller behind the pilot, pushing the vehicle forward. As the forward velocity increases, wind resistance causes the top rotor to spin, providing lift. For a gyrocopter to remain airborne it must be moving forward. Essentially, the same rules that apply to the take-off and landing of an airplane apply to gyrocopters.
Max is carrying 4 fuel cans back to the big rig (4 cans @ 5 lbs per can empty = 20 lbs). He is using a metal bar to carry the cans (~10 lbs).
He requested diesel fuel and high-octane gasoline. The cans look to be 5 gallon containers. Diesel fuel weighs 7 lbs per gallon (3 cans @ 35 lbs per = 105 lbs). Gasoline weighs 6 lbs per gallon (1 can @ 30 lbs). The load Max is trying to carry is around 160 lbs. It isn't realistic that Max would be able to left, carry or shift this load on his shoulder with the ease displayed in the film.
When Max carries the 4 metal cans full of gasoline to retrieve the truck, the cans appear empty by the way they are swaying back and forth from the pole he's using to carry them. In addition, when the gyro captain drops them to the ground once they reach the autogyro the cans make a hollow-sounding noise, also indicating that they are empty.
When everyone is getting ready for the final chase, and the Kid is taken from between the tractor and the tanker, you can see that the air brake lines are not hooked up, even though the truck is about to pull out.
After Max rolls his car, Toadie checks the tanks and declares them full. He then opens the cap and a thin stream of liquid pours out. In the next shot of Toadie, the liquid quickly slows to a dribble and then stops altogether.
During the final chase, Pappagallo is killed when Humungous hurls a triple-bladed 'harpoon' into his back, right between his shoulder blades. At the time, Pappagallo was driving the Lone Wolf; the vehicle's rear cowl rose higher than the top of his head. In order for the area between his shoulder blades to have been exposed, Pappagallo would have to have been standing up in the driver's seat.
During the final chase, a Ford Fairlane with police lights on the roof gets firebombed by the guards on the tanker. For just an instant before the bottles are thrown, a thick, Vaseline-like goo is visible spread all over the car's hood and roof. This is a flammable gel, applied to the car to make the flame-up look more impressive.
The goof items below may give away important plot points.
The Toadie attempts to catch the Feral Kid's metal boomerang and has his fingers cut off, despite him witnessing it kill the Golden Youth seconds ago. He should have already realized that it was deadly.
During the final chase, as a marauder and The Mechanic is having a "tug-of-war" over the wounded and dying Warrior Woman hanging on the barbed wire, in one shot someone else is seen atop the tanker moving towards the cab. It looks vaguely like the Feral Kid but in shots before and after we see that he's in the cab, helping Max fight off the marauder holding on to Max's shoulder, and no other compound folk are supposedly left on the truck at that point (the entire crew being The Mechanic, Warrior Woman, the Feral Kid, Max and the man in the turret at the back who got pulled to his death early on during the chase).
During the final chase, it's very doubtful that Humungus, even with his strength, could have thrown the spear with enough velocity to reach Pappagallo. Both vehicles were moving at essentially the same speed, and once the spear left Humungus's hand, wind resistance caused by what was likely near-100-mph speed would have pushed the spear backward immediately.