A friend of mine asked me to get the oil changed in her 02 996 today. She was confident that Jiffy Lube would do a fine job since she has taken it there before...and Wal Mart. I bought an oil filter for them to use and they filled it with Mobil 1 synthetic per her instructions. Under the tach in the led display area it is showing 41 in temp window. The temp worked just fine prior to change. Also, it constantly shows 0 mph next to it. The mph displays just fine in the speedometer window. Any ideas? I have a 944 so I am no help.