I have a 96 SL1 97,000 miles we just changes sensor, air,fuel,and oil filters runs better already the sensor fixed the hesatation,stalling,temp gauge but the first day I got it after putting 65 miles on it it started smoking and sediment came outof thecoolant reserve tank that's when we replace the sensor but nowoil is still going into the tank not as bad but it is still oil getting in there how or what parts do I need to correct this problem.Is this a commonproblem with saturns I've heard the sensor problems are common Iwant to fix the car completely I love it!!

sounds like you need a head gasket

i agree...engine oil in the radiator almost always means a head gasket.