http://www.fleetfilter.com/oilfilters.html Kohler Wix number 51348 is $2.79. They have unbelievable prices on all their filters. Here are just a few of the filters I used to buy from Filter 1 and the price difference. EDIT: The prices didn't line up right. The prices behind each filetr is in this order. Fleetfinder, Filter1, and O'reillys. Chevy 5.3L Fleet.... Filter1.... O'reillys.... 51522 Oil $3.39 $6.10 $6.29 + tax 42488 hvy duty air $8.50 $15.29 $21.49 + tax 24805 cabin air $9.85 $17.72 $19.95 + tax 33481 Fuel $6.73 $12.10 $13.49 + tax Kohler 27hp (fleet doesn't have air filters for Kohler) 51348 Oil $2.79 $5.02 $5.29 + tax 33031 fuel (same as oem) $1.44 $3.45 $3.99 + tax I could list for other truck and mowers plus wifes car but I think you get the jest of the cheap prices. Take a look for your wix number. I just ordered 23 filters which included the ones above and some others for $78.74. Shipping was $12.62. I think shipping starts around $8 but doesn't go up much after that. So for one filter go to O'reillys but for stock fleet is the place. I do not have any affiliation with fleet. It's just a site I ran across for ordering Wix filters and wanted to pass the info to my fellow LCO's.