If you test spin a bearing that has just been solvent soaked, it still has solvent in it and will spin a long time because the solvent acts as a short term super low viscosity lubricant. Let it sit until that solvent evaporates and it will not spin long at all. Lube it with bearing oil and it will still not spin because of the surface tension of the oil. But install it in a reel and the spool mass overcomes the oil's surface tension and the spool will spin much longer. This all points to a couple of tips:
Use a low viscosity solvent to flush bearings, or alternatively, let them soak for a long time. I use ether based starting fluid. Can't get much lower viscosity than that!
Let the bearing dry after flushing until it no longer spins easily on a pencil tip. Then you know all the solvent has evaporated.
The thinner the oil you use to lube the bearing, the easier it will spin in the reel. But there is a trade-off. Super thin oils get thrown out of the bearing easier and will not last very long. Thick oils will last a long time but will cause more resistance in the bearing.
JMHO, if you go to the expense of buying ABEC-9's, you want to use an oil thinner than Abu Silicote Reel Oil. I use thick oils like Abu on non-spool bearings. It works fine in low speed bearings and stays in the bearings longer. For high speed spool bearings, oils like Yellow Rocket Fuel, Quantum Hot Sauce, Reel Butter Bearing Lube, Friction Zero, etc are popular. FYI, the viscosity of Abu is 176 at 78 degrees F. Yellow Rocket is 59, Hot Sauce is 25, Friction Zero is 8. I've used Yellow Rocket for years and like it. Hot Sauce is good but I simply hate the red dye. Friction Zero? Maybe too fast for an old man