If you want your car/truck…
If you want your car/truck to last. Chasis oiling should be part of your maintenance too. Parts can be changed, but chasis is not replaceable. Sure, if you have an extra ten grand burning a hole in your pocket. Don't go to places that don't spray everywhere otherwise it's wasted money if not done right. Shop around & nevermind places that give you a warrantee; they have their little tricks. Drill around the doors & undercarriage minimum.