So my car has been losing coolant and i've taken it to the dealership twice and they cant figure out where it is leaking from so theyve just been topping it off and sending me on my way. I have been noticing a little higher of oil temps recently and just driving it around town its been getting to the half-way point. After getting it back from the dealership today I took it to my favorite road and drove it very hard and the oil temp started rising very quickly and after only a couple WOT the temps were at the 3/4 point. I immediately pulled over and let it cool off and there was a strong coolant smell. However, it cooled off quickly and on the drive back the oil temps were much less than halfway and didnt go above that. Any ideas whats going on?