Originally Posted by ForcesR

I have both too, the FG60 & FG90 and yes the FG60 has more oil coming out of the crank case vent nipple when running than the FG90. It's nothing to worry about, both of the engines internal components get proper lubrication by piston blow by oil. I know this because I was curious and took both engines apart to check for lubrication after break-in. The FG90 also has a larger deeper reservoir than the FG60 to collect blow-by lubrication oil before it reaches the nipple outlet hole allowing the excess oil to vent to atmosphere.