Many car dealerships are using 5W-20 now because it supposedly improves fuel economy. Even though our cars have 5W-30 on the oil cap back when Honda did my oil changes, they were using 5W-20 oil. I really don't think it matters especially because our cars are Hondas. I've run both oils in my car with 135K miles and both did what they were supposed to do. All I would recommend you do is to get a K&N filter. Our cars use an HP-1008 filter. It's a couple bucks more expensive than a honda filter, but I don't think it's a lot to ask for a little peace of mind. I finally got to cutting open a honda filter and a K&N filter the other day and there are differences between the two. The K&N filter in my opinion was built better.