K & N filter change
I purchased a 2013 GMC 3500 with a duramax diesel engine.....I filled it up, took it on a road trip down the interstate 65 miles to the next town then turned around came back and refilled it. 17.3 mp...
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K&N's LIfetime warranty is number one reason I've never owned one. Read it word for word. Number two reason is I'm not having any problems with the OEM style paper media filter. Why would I revert back to '40's technology? Manufacturer's are doing everything feasible to meet CAFE requirements. If there were any gains to be had by simply using an oiled gauze filter, they would be using them as OE. Oiled media filters were used in the '50's and earlier. We've evolved since then. NASCAR "used" to use oiled gauze filters. After it was determined that many engines lost during the race were caused by tiny clumps of dirt building in the filters, breaking away, sticking to cylinder walls and causing catastrophic engine damage, they went back to dry media filters much like our OEM filters. I seriously doubt K&N's marketing geniuses know more than auto manufacturers' engineers. But they do come with an ultra cool sticker! :B
