My Pro-Ject Xpression III motor makes a weird little creak/groan sound when it starts to spin, or spins down. I'm wondering if this means it needs oil, or if I need a new belt? I know Pro-ject sells "grease it" but they have no instructions on their website or TT manual. I have 3 in 1 oil, but I've read conflicting opinions about using it on turntables. Any thoughts?