OK so I was changing my oil myself for the first time today with the help of my cousin. Halfway through pouring the new oil in I realize that I picked up the wrong bottle from the shelf. My manual says I should use 10W30, but the stuff I just poured in was 10W40. Is this that big a deal? Can I hold off until my next oil change to correct it or do I need to change it NOW. I will be driving from Florida to Michigan in two weeks, but it is still too early in the year for drastic weather changes. Please let me know ASAP!! Thanks!!