Light only comes on when at low rpm's small flakes of metal in oil, was told main bearing was going if I change oil will it speed up the processes of it locking up or not. Just asking can't afford a new car now or repairs.
To be honest, I can't say changing the oil will do anything other than remove the contaminated oil that is presently in the vehicle. Make sure the filter is replaced too.
If you see metal shavings in the oil, that really isn't good news. But I have a couple questions. First, do you hear any knocking or ticking from the engine? If not, has the pressure been tested using a mechanical oil pressure gauge?