I went to wash the car today and once I had everything out realized I was out of car wash soap....it's been over a year since I had a car I cared about enough to hand wash so didn't even think to check. Anyway, I remember reading on the back of the Murphy's bottle that you can use it on cars, so I did a quick Google and found a few car sites with people praising it. Anyone else using it? I've always used it on the interior but would use a Meguiar's product on the exterior.