Hi MUD, 1991 FJ80 with the 3FE and 235K miles on the clock. I’m getting measurable and visible gas in the oil (and crankcase). Using Rotella 15w40 and the viscosity was so low that the oil was dripping from the dipstick after about 1,500 miles. Oil was black and smelled like gas during the resulting oil change. I’ve read that it’s probably either worn piston rings or a stuck injector. Also, I may have a thermostat stuck open (could that result in the excess fuel?). Hoping you can point me in a direction here to diagnose. Thanks MUD and appreciate you all!