Being very (emphasis on very) low on cash I have not been looking forward to paying for my oil change. Its been 6000 miles now though so it really needs to be done. Currently im running 5w-30, but amazingly enough i found 4 quarts of sealed Mobil 10w-30 in my garage. Will this work in a V6? And does the v6 need 5.7 quarts? Also, should i change the oil filter as well? It was changed furing my last change.