Agree with Buster, I have ran 0/5w-20 in my Honda's with no problems. I don't think you will have any problems if you do use a 30 weight, however it's not going to be any different than the 20 weight. I have ran many different oils, Edge may be one of the better oils I have ran in my Honda, so give that a try to see if it helps with consumption. Some cars just like a little oil, no harm done.