My first book that taught me about engines, "How to keep your VW beetle alive, a step by step manual for the complete idiot", led to my first job shortly afterwards. Rebuilding Porche 911 engines in vintage 60's 911. It's becasue after reading the whole book, and not knowing what oil did or how to change the oil, I took the engine out to see how it worked and of course changed the oil. The point here is that in this book, when things were going wrong, the author knew to stop and throw in a joke. Not kidding. So, now that that has happen, can anyone guess this part!