low on oil , is engine ruined on 2000 Dodge Grand Caravan

I have a leak but I normal keep the oil filled up I let it run low by mistake and now its knocking...did I ruin the engine?

Asked by for the 2000 Dodge Grand Caravan
I would have it looked at. An engine knock because of low oil is real bad. Serious engine damage is now occurring every time it’s being driven.

there probably is damage to the pistons or piston journals or the crank shaft damage due to inadequate lubrication.
Oh no! Is that expensive?