Operating an engine upside down causes oil starvation. Blue exhaust smoke will occur from oil submerging the cylinders, and the engine bearings could fail.
If a vehicle starts fishtailing from side to side, you need to countersteer earlier and faster. Using a steering wheel (or gamepad) is highly recommended.
ui.hints.startSlow
It's easy to run wide in corners when driving a carvehicle for the first time. Start slow, and drive faster as you get to know how each carvehicle handles.
When cornering with a keyboard, repeatedly tap [action=steer_left] or [action=steer_right] to better control the steering angle and prevent unwanted understeer.