In what position of a tractor will you correctly check the oil level in the engine?

In the photo, a yellow engine oil filler cap with an oil can symbol and the word "OIL". You will check the engine oil level correctly after parking the tractor on a level surface - answer C.

The dipstick measures the height of the oil in the oil sump at one point. When the tractor stands at an angle, the oil flows to one side and the reading is false - too high or too low, depending on the direction of the tilt. That is why tilting towards the dipstick (answer A) and parking in any position (answer B) lead to an error, and as a result to driving with too little oil or to overfilling the engine. You put the tractor on even, level ground, switch off the engine and wait a few minutes for the oil to drain into the sump. Then you pull out the dipstick, wipe it, push it fully in, take it out again and read the oil mark between the MIN and MAX marks. You top up missing oil through the filler cap, like the one in the photo.

Legal basis: Art. 66 para. 1 point 1 of the Road Traffic Act (Prawo o ruchu drogowym)