Seriously, I can only tell you all because you will understand.
A little while ago there was a topic on here about oiling your machine- I think someone didn't know if they were supposed to. Long story short, I decided to look in my machine's manual to see if I had to oil mine. I had always assumed I didn't because I wasn't TOLD when I bought the machine. It's a Babylock Quest Plus.
Guess what? Oh yeah, it needs to be oiled in a little spot on the bobbin case about every 15 hours of use. I've had it since July of last year. Luckily I have some machine oil that came with my Bernina embroidery machine that I got in November.
My sewing "mantra" has been expanded from the basic "measure twice, cut once" to "read and understand your manual".