It's a 1986 Chevy Cavalair with a 2.0 motor, I was driving down the freeway the other day when I noticed alot of smoke, behind me. I found out when I got home, It was coming from oil on the motor. I changed two sending units, thinking that it was coming from them. I didn't notice any more oil, after degresing it. I started it up and ran it at an idle, and no oil appeared. Not even underneath it the next day. Then going down the freeway a few miles later, at a speed of 65. It started again. I looked under the hood and oil was all over once again. It looks like it is on the same side, Passinger rear, and lower then the valve cover, about in the sending unit area. also looking underneath, it has oil about in the starter area. But with the wind and all who can tell. Is there a area in this type of car, known to leak? or any idea's? Thank You, with respect, Steve