Only happened twice in the last 6 months or so, oil temp is usually (when warmed up) in the 90's depending upon driving 'style'. Twice now its suddenly started fluctuating wildly from cold (after it starts registering the temp) anywhere in a range of 40 to 50 degrees rapidly scrolling up and down whilst driving normally e.g. between 95-145. Once cooled down its back to normal again and its only done it twice. I will get the dealer to look into it next year on its service but just wondered if anyone else had experienced this. Of course if I didn't have water and oil temp displayed in the LH dash area area I wouldn't have known this was happening!