Hey fellas, we have always used Rotella 15-40 oil for our equipment, so we think very highly of it. I'm ready for the first oil change on my Deere CT332, and the owner's manuel says to only use John Deere brand 10W-30. I know that it doesn't matter if I use the John Deere brand, but I'm wondering if I switch to a heavier weight like the Rotella 15W-40, if that would matter? The 10W-30 is the break in oil, and I would use the Rotella 15W-40 from now on. Has anyone else switched, especially if it was a Deere? I'm guessing it's not a big deal, I just thought I'd get some opinions before I changed the oil. Thanks!