decsnz 0 Report post Posted July 23, 2007 Hi, What fuel should I run in my jap 95 318ti. 91 or 95. Also I have been told by my mechanic that my knock sensors need replacing. the car has only done 56000kms. Are these a common item to go? It seems a bit gutless at low RPM and the engine does not feel like it is running right and idles erratically. He has quoted me $360 each. Is there a cheaper place to get them from? One more stupid question. What is the engine an M42 or M44. Any help would be appreciated. Quote Share this post Link to post Share on other sites