"F" and "E" on my oil filler cap? Why?

John Martin said

Then you explain since you’re CLEARLY superior! I don’t see you coming up with anything. Try not to come across as a jerk-off. I’m not against someone disagreeing with me, but the way you wrote it says a lot more about you than you could ever tell me.

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For real, I'm 100% all for calling out B.S., but in doing so You'd better have experience(1st hand) or evidence to the contrary. This sort of knee-jerk "I didn't find it on google" response is what I'm getting sick of, plus a lot of folks don't try to learn anything anymore,......just consult St. Google for the answer.(Daddy Fix!!). By all means 69a100, if You know the answer please share it, if You have evidence that Co. doesn't exist, or did not manufacture those caps likewise. Rabbits up bums after just a google search ain't makin' it.