I tried to change my transmission gear oil myself for the first time today. The manual says it takes 0.18 L so I saved what I drained and it was the right amount. The manual also says, to check oil level, look through the fill hole and the oil should be up to the brim of the hole. This said to me you can fill to overflowing. I added new oil with the squeeze bottle it came in, and periodically checked the amount I added where it's indicated on the side of the bottle. Got to about 0.18 L and couldn't see any oil at the brim of the hole. Added more and saw none. Still more and still saw none. When I got done adding and looking I had about 0.5 L in it. Not good! I drained it all out and refilled with 0.18 L. Took'er for a spin and seems OK. Not knowing the innards of the beast, did I screw anything up?