Hey, i just finished doing my head gasket and timing on my 1981 22r. just after firing it up i notice the oil was very thin and almost a Goldie brownish/black colour) it does not smell like coolant or gas, but the thinning could be explained by flooded cylinders (gas seeping past piston rings), i kinda ruled out coolant because the oil that came out was so thin, just wondering whats the deal with this oil or if anyone has run into these issues before

 

i have that same problem, but cant figure out what it is either

 

Sounds to me like u have fuel in the oil. The color and thinning match it perfectly. If it was coolant it would be whiteish and the coolant would float on top and not mix. I would run the engine for a bit with that oil then drain it and put new oil in. Make sure to drain the oil filter as well.