Once again you cant answer a simple basic questions that are asked of your self. Ypu done an aps course and now ypur an instant expert on sfa. You can quote all you like thats because you dont have any knowledge at all on aircraft engines bar your skills at being able to find quotes on the net. You have zero skill level in maintaining or actually what how and why things happen within the engine and the interaction of all the components that make the engine work.
Basically your a paid up member of the aps troll net work or clut you can choose either of both as you fit both requirements.
So answer the question btw you also were one of the lot tbat didnt know the burn rate of a lean mixture before the thread was deleted strange that.