Why did International change the color of the valve cover stickers each yeah? My 2000 (235hp) has a green sticker and my friend's 2001 (250hp) has an orange sticker. Both Auto trans, if that matters. My old 2002 had a white and orange sticker. I know this question may seem odd but I'm just curious.

 

Have no idea... Wish I had replacement stickers... mine were pressure washed off a long time ago. But that's just my OCD kicking in....