ok, after that mind-blowingly retarded thread on oil level checking, here's a simple logic exercise for those whose neural networks haven't collapsed:
imagine you're a large vehicle manufacturer. and as a large manufacturer, you sell your vehicles to all the global markets you can, including high volume segments like taxis. imagine that those taxis are a fleet operation in service 24/7. now, as a fleet operator needing to maintain those vehicles in a regular basis, what makes the most sense to you...
- take a vehicle out of service for 12 hours, let it cool down, and then check the oil level?
- take the vehicle out of service for 2 hours, "let the oil run down", and then check the oil level?
- check the oil level after the vehicle has been standing for 2 minutes while it's being refueled?
now, back to the manufacturer, and you want to get it right, only one of the above scenarios is logical and consistent for every vehicle you ever sell, anywhere on the planet, and most importantly, doesn't cost your customers money. which one makes the most sense to calibrate for?