just had a headlight bulb burn out in my 97 ram 4x4 this weekend. i went ahead and replaced both at the same time as usual. as i was logging the service into my service journal i looked back to see when the last time the bulbs were replaced on this truck. at 275,350 miles and 10+ years of rough service this is the first time i have ever put new headlight bulbs in the truck. i was amazed, the factory bulbs lasted a decade.
i decided to look at the service records on my other dodge trucks. the 2001
3/4 ton 4x4 diesel at 160k is still on the factory bulbs. the 1991 dakota that has 177k known miles (had a broken odometer for a while) is on its 2nd set of bulbs. the 1993 4x4 dakota with 220k is on its 5th set of bulbs. i am now curious as to why the 93 goes through so many more bulbs than the others. any theories? michael