Good morning, I changed the oil at my car (Twingo C06) last year. Now I have problems that the car is stuttering quite violently when giving gas and this is getting worse and worse. If I check the oil level by rod, the oil level is exactly in the middle of the scale. I first thought there was something broken like throttle valve, spark plugs, … Now I have unscrewed the lid of the oil pan and there is everything at the top with white fat. I pull the stick out, but is quite normal there I look through the hole through the fat, but I don’t see any oil at all and it looks like there’s no oil in it. What kind of fat is that and how does that come about?