Hey gang, I know the search button is my friend, I did some research but I'm still looking for opinions. I just picked up my 05 WK limited with a 5.7. The best mileage I've seen according to the lie O meter is 9.7 mpg.
The truck has 50k miles on it. The only code showing is the p1521. What would you guys do to try to get the mpg's back to where they should be?
I was thinking proper weight oil so the mds will work, new egr valve, pcv and spark plugs. Also, does the p1521 code have to be cleared or will it go away with time after the proper weight oil is in it. Thanks in advance.
2005 WK, limited. Bone stock.....for now.