Do you know about a website called gasbuddy.com? If not, check it out; I just did and it looks like once you get out of CA, the price of gas will decrease. Looks like Kansas/Oklahoma has the cheapest gas...possibly as much as $2/gal cheaper than CA. Interstate 40 will take you right through there. I've used this website a lot to find where the cheapest gas is en route on trips...it's updated at least daily.