I have a quick question regaurding a 1985 Johnson V-4 90hp.This motor has had the VRO removed and I run 50:1..<br /> Qustion I have is when I brought it home from the lake Sunday I parked it in the driveway with the motor stored in the vertical position, havent looked at he boat since Sunday until this morning and noticed a black oil looking stain on the driveway below the motor. I just changed the lower unit oil about 3 weeks ago and wouldnt think it would have turned black already, its only been on the water maybee 3 times since it was changed. Any help on where this oil may have came from would be greatly appriciated.