Rattling noise coming from passenger side possibly engine when going up steep hills, for ranger?

I ave a 2007 ford ranger and recently when going up hills there has been a rattling noise that seems to come from the passenger side towards the engine or front of the truck. What could cause this? I also recently had an oil change, and they put 5w30 in instead of the recommended 5w20, could any of this be a cause?

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