@bloodycrashboyAmateurs use funnels, real mean smash a stubbie in half and get oil everywhere on the way to oil filler.
Speaking of oil changes, my mates xr6 turbo is a neglected POS. Asked me how to fix his noisy engine....
After checking his oil/black tar, I decided too drain the oil. Poured 4 litres of diggers wax and grease remover in, why you must think, its 4 litres of hydro carbons for the win.
Told him too turn the engine by hand for 15 min, that was amusing enough to watch the fat *beep* get sweaty and complain about hard work.
Poured 12 litres of acetone through it with the sump plug out then filled it with cheap 10/40 mineral oil. He went for a drive while I got drunk. Dropped the oil to put in his sh*t box 4wd, then filled it with penrite semi synthetic 10/40.
Whisper quite now. But I probably stripped all the good stuff from all the important bits and Bob's. At least his engine is pretty and clean now.