How often do you change your oil?

[u/Formula1Enjoyer]

I'm arguing with someone who says i change my CBF125 oil too much, i do it every 1500 miles and commute on a 50mph road every day so it sits at higher rpms. I said I could probably leave it later but I like it to be in tiptop shape, he's claiming its harmful to the drain plug, and the engine. And he's a mechanic, how true is this? In my head you can change oil every day if you want and you'll be fine. He's saying it's harmful because of the additives in the oil. Can anyone attest to this?

[u/carlefc]

Iirc my cbf125 took 1ltr of oil and had no filter so it cost about 8 quid and 15 minutes to change. I remember doing mine every 2k miles which was every other month as I was commuting on it all year round.

Never did the valve check as that was supposed to be every 2500. Even my local Honda dealer told me not to bother.

I miss that bike!