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...
Forum Discussion
Some of you believe in K&N filters and that's fine- I'm not trying to change anyone's mind- but I have to disagree with the assertion that the majority of us who experienced more-than-acceptable dirt buildup in the intake must have installed it improperly...I'm no Carroll Shelby but I'm pretty sure I managed that complicated process correctly.
I refer back to Hannibal's post:
"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!"
If the guys at Nascar have gone back to paper I don't need any further convincing. And if you force me to choose a camp, I have more faith in the engineers employed by the manufacturers than those drawing paychecks from K&N.
To me it seems pretty logical: if there were legitimate HP gains and/or better FE, even .5mpg, the OEs would be ALL OVER oiled media filters. HP & FE figures go a long way in helping sales, and the opportunity to increase those with a simple filter change would not be passed over.
I refer back to Hannibal's post:
"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!"
If the guys at Nascar have gone back to paper I don't need any further convincing. And if you force me to choose a camp, I have more faith in the engineers employed by the manufacturers than those drawing paychecks from K&N.
To me it seems pretty logical: if there were legitimate HP gains and/or better FE, even .5mpg, the OEs would be ALL OVER oiled media filters. HP & FE figures go a long way in helping sales, and the opportunity to increase those with a simple filter change would not be passed over.
