Use the factory fuel funnel!!
Just a little warning for you all to learn from my mistake:
Make sure you use the factory fuel funnel when adding anything to your tank. I had a funnel that had a pretty long neck, and was using it to add some Power Service Diesel Kleen additive to the tank. I thought the funnel was long enough to get into the neck, but somehow it only got to the overflow tube area, so it dumped half a bottle in and it slowly poured out the overflow, onto the inside part of the wheel well, and all over the garage floor. Even though it wasn't much, I cannot get the smell to go away in the garage or around the vehicle. You can smell the vehicle from across the parking lot.
Lesson learned: use the factory supplied fuel filler or else your garage and vehicle will have a new air freshener that smells like it could melt the paint off the wall.