Remind me of the last time I send for engine oil change...
7.30am - Masuk, register, handover key.
7.45am - Tech drive car to working area (Wah, thought can finish early, cancel my leave

)
7.50am - My car naik hai hai
8.00am - Tech open engine oil plug at bottom. After that tech hilang dunno go where
8.30am - Tech comes back, replug the engine oil plug, lap lap a bit, bring my car down, then hilang again. Replace the oil filter too sometime here.
9.15am - Tech comes back, open hood, start refilling engine oil. Hilang again with bottle still upside down at the engine oil inlet.
10.00am - Tech comes back, lap lap again, clean air filter. close hood. Hilang again.
11.00am - Tech drives car to waiting area, handover key to SC rep. Kena marah by boss.
11.30am - I get back my key

it also depends how long you were driving your car before going to SC.
they have to wait until it cools down before opening the oil plug and draining it