About that time of year again. Just wanted to get ya'lls take on this subject. I've used both of them over the years but I'm leaning towards MMO for "fogging" the engine for winter setup, and probably longer. I've used the spray before and really don't think that it would saturate the valves, piston, rings and bore as well as MMO. In the past, I've poured MMO through the carb. while the motor is running for a little bit. Then, once I'm comfortable knowing I've got a good amount in there, I'll give a good dose to the point that the engine starts stalling and then shut the engine off. Done. Haven't had any real problems doing it this way and MMO is a lot cheaper than some fogging spray. Ingredients are fairly similar. What do ya'll think?