After driving the car to and from work and around town I have noticed this; It generally runs between the r and m, goes just to the end of m, the fan kicks in and volia, back to the middle. Four times in the past two days it has gone up to the l, I pull over turn the car off, pull the temp sensor harness, reattach it start the car and I am good to go. The one thing I have noticed is that when this happens the resovior is much higher than normal and the hose leading into the thermo is hard. Could this be a sticky thermostat?
Thanks again