Originally Posted by gmsux
I'm trying to understand your question, are you deliberately misspelling and using bad grammer? I hope so.
Did your oil change involve putting 5w20 back into the engine or did something thicker get put in? Thicker oil will cause more fuel consumption...
I have tried hevier oils and never seen a MPG change, right now I am running 20-50 for the summer and my MPG is the same as it has been.