That is from methanol laying in the cylinders.
I have seen that enough times over the years.
The only way I ever got that to stop is to put a gas primer on my car and run it on gas to clean the cylinders out at the end of the day.
Does running top end lube in the methanol help at all?
I see Greg did use a gas primer system, including at the end of the day to clear the engine.
I dont think lube makes much of a difference Jim.
They are more like stains that look worse than they actually are.
I found that just shutting the alky off and running on the primer isn't enough. Seems like fuel will still be left in the barrel valve, lines and nozzles and drain and drip into the engine. After I have run mine for a few minutes I blip the throttle several times before I shut it off.
