I hear gurgling coming from the engine area for a few seconds in the morning when I first start the engine. I changed the oil from 5w30 to10w30 and the weather is kinda cold, not freezing but still cold, does this have anything to do with it? Also, I heard gurgling coming from the gas tank area while driving, does this mean I need new fuel pump or filter?

Thanks

 

Gurling from the engine, I'd be inclined to say the cooling system....... As far as gas tank, your guess is as good as mine.