Well, from what I can see it looks like we are both correct, moisture buildup in the engine, and in the exhaust, comes from both condensation of water vapor in the air as well as combustion by-products. https://www.sae.org/publications/technical-papers/content/250030/ https://www.mobil.com/en/lubricants...uto-experts/how-does-water-get-into-motor-oil https://dannysengineportal.com/white-stuff-under-my-oil-filler-cap-what-is-it-is-it-bad/
The Jalopy Journal
