The owners manual for my 2008 Hyundai Veracruz gives me the option of 5w20, 5w30, or 10w30 oil. It adds a foot-note though about 5w20 being recommended for the best fuel economy. I would rather have better wear protection at the expense of a little fuel economy. Im in Virginia. Our temps rarely dip below 15 degrees in the winter but often climb above 90 in the summer. Would there be any benefit of using the 5w30 over the 10w30? In my local Walmart, the 5w30 oils cost more than the 10w30s for some reason.