When you change the oil, when are you suppose to check the oil level? When the car is warmed up or when it is cold?(To get an accurate reading)
I have a GS-R btw, if that matters.

 

drive it around for awhile, then wait for like an hour and check the level

 

I have always checked it cold. Checking it warm or hot can give you the wrong measurement. which might make you think about adding more oil when it doesn't need to be. Then there could be a chance of blowing oil seals by doing it. So check it when it's cold.

 

after changin the oil start it up for like 5-10 mins. and then turn it off and let it sit for a while til it get cold then u can check the level of the oil. make sure ur not on a uneven pavement.