First off THANKS for all the great info on this site, now for my question for all u experts, I drive in extremely dusty conditions all summer and was curious to what filters others are using. My last truck was a 96 CTD 4X4 and I used a K&N washable in it. I was definetly happy with it, but am curious about other choices out thier. The stock filters are always showing that they are dirty. Thanks for help.