Need to replace headlight bulbs and using Sylvania Xtravision. Do you use and Why isn't bulb grease included in bulb packaging . It would make more sense if they would

 

Bulb grease is dielectric grease which when used in electrical connections helps prevent corrosion of the contacts.

My guess is the manufacturer is leaving the choice up to the installer and has concerns it may get on the glass portion of the bulb. No grease included means no liability for this type of damage.

Plus less expense to package.