After changing the oil, my mileage seems to be a little better now.  I'm gonna try driving it for a while and see how it runs.
I would like to get it checked, but I know I will have problems with the dealers around here.  They don't  like looking at any cars other then stock, or I can take it to a local garage where hopefully I will get it back with in a week...I think thats why everyone here drives shiny new cars...  

My dads car had leaking injectors, what happend is that all the fuel under pressure will leak out of the injector, seep down through your valves down past your pistons.   You could take the plugs out with a cold engine and see which cylinder is wet and replace the corresponding injector(s)/ or you could run a fuel injector cleaner.  they really work, I use stp, about twice what they recommend on crappy injectors.