This had happened to me end of October 2018 when the bike (G310R) was brand new, it had run only 250 km, I was trying to cross a water crossing which was shallow but lots of rocks in it, I couldn’t see them as the water was muddy subsequently I went over one of rocks, lost my balance and fell on the right side I quickly cut the engine and pushed the bike out. I later tried my best to start the bike but wouldn’t start. Ultimately I had to tow the bike to the BMW workshop, thereafter inspecting the bike they told me that the water had entered into the engine oil chamber through the air filter or silencer or both thus spoiling the engine oil which had turned white color. Then they flushed engine oil twice and replaced with a new one. Now the bike is running fine but once again I replaced the oil after 1000km as per the dealer's advice.