KN filter
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2017 C43 AMG
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From: Mass
2026 GLE 53 Coupe
"Qualified engineers using advanced software and expert technicians using the latest technologies produce BMC air filters. An F1 filter must be very light, must be made of the best raw materials and must improve performance. For this reason we use only alloy mesh with epoxy coating to ensure protection from petrol fumes and from oxidization due to the humidity of the air. The filtering material is composed of a special cotton gauze soaked with low-viscosity oil to give you the best air permeability."
http://www.bmcairfilters.com/eng/rep...r-filters/1/c2
I've used a K&N replacement air filter in my 2015 C300 2.0L, and I have K&N replacement air filters in my 2016 C450...NEVER seen even a drop of oil in the intakes of either car...or any car I've ever owned with a K&N filter installed.
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17' C43 Sedan
Yeah never seen oil in none of the cars I've used the filters on. This comes from over oiling by the user.
Did you noticed a noticeable improvement at all in any areas to justify the price?
Did you noticed a noticeable improvement at all in any areas to justify the price?
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C43
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C63 AMG Black Series
Anyways, on high flow filters themselves you won't notice any real benefits from just a drop in/panel filter.
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From: CO
'17 C43 Sedan (gone), '08 Evo X MR, '20 C43 Sedan
BMC doesn't make a "dry" replacement air filter...
"Qualified engineers using advanced software and expert technicians using the latest technologies produce BMC air filters. An F1 filter must be very light, must be made of the best raw materials and must improve performance. For this reason we use only alloy mesh with epoxy coating to ensure protection from petrol fumes and from oxidization due to the humidity of the air. The filtering material is composed of a special cotton gauze soaked with low-viscosity oil to give you the best air permeability."
http://www.bmcairfilters.com/eng/rep...r-filters/1/c2
I've used a K&N replacement air filter in my 2015 C300 2.0L, and I have K&N replacement air filters in my 2016 C450...NEVER seen even a drop of oil in the intakes of either car...or any car I've ever owned with a K&N filter installed.
"Qualified engineers using advanced software and expert technicians using the latest technologies produce BMC air filters. An F1 filter must be very light, must be made of the best raw materials and must improve performance. For this reason we use only alloy mesh with epoxy coating to ensure protection from petrol fumes and from oxidization due to the humidity of the air. The filtering material is composed of a special cotton gauze soaked with low-viscosity oil to give you the best air permeability."
http://www.bmcairfilters.com/eng/rep...r-filters/1/c2
I've used a K&N replacement air filter in my 2015 C300 2.0L, and I have K&N replacement air filters in my 2016 C450...NEVER seen even a drop of oil in the intakes of either car...or any car I've ever owned with a K&N filter installed.
Improved mileage is possible, especially if your previous panel filter was incredibly dirty. If it was brand new, there's probably not a much of a difference vs. just your pedal modulation.. The throttle feel may also come from a better burn and/or more air passing into the engine.. but again I can't imagine it's more than just a butt dyno fake feeling on a brand new vs brand new filter.
If the stock air boxes were restrictive in themselves and you moved to a cone/open filter setup that was able to breath much more, you'd definitely feel that (and hear that nice turbo spoolup through the intake!)
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From: Mass
2026 GLE 53 Coupe
My recommendation against an oiled filter was more for the user who ultimately goes and buys K&N's recharge kit down the road and absolutely drenches their filter in oil. Not saying oiled filters will always screw with MAFs (I run an oiled filter on my fully built Evo), just that most of the failures are user error which can be avoided.
"Avoid an oiled filter if there is a MAF behind the air box. Nothing will ruin your day like filter oil on a MAF."
Personally I never re-oil my K&N filters. I just brush off the dirt layer, and when it get's real dirty, I toss it and replace with a new one. To me it's not worth paying the $12.95 for the cleaning/re-oiling kit which is about half the cost of a new K&N drop-in filter.
Improved mileage is possible, especially if your previous panel filter was incredibly dirty. If it was brand new, there's probably not a much of a difference vs. just your pedal modulation.. The throttle feel may also come from a better burn and/or more air passing into the engine.. but again I can't imagine it's more than just a butt dyno fake feeling on a brand new vs brand new filter.
2) Most people like myself buy a replacement drop-in K&N air filter not just for it's reuse-ability, but also for improved throttle response, not for a theoretical HP increase. As a bonus, I usually see a slight increase in fuel mileage with the K&N compared to stock.
Last edited by MASSC450; Jul 11, 2017 at 08:54 AM.
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From: GA
X3 M40i
Then you should have been more clear. You inferred all oil infused air filters will foul the MAF with your statement here...
"Avoid an oiled filter if there is a MAF behind the air box. Nothing will ruin your day like filter oil on a MAF."
Personally I never re-oil my K&N filters. I just brush off the dirt layer, and when it get's real dirty, I toss it and replace with a new one. To me it's not worth paying the $12.95 for the cleaning/re-oiling kit which is about half the cost of a new K&N drop-in filter.
Two things, 1) An aftermarket performance air filter like a K&N or BMC will flow better than the stock paper air filter...that's fact. A K&N or BMC does not filter as well as the stock filter, but 99.8% filtration (in comparison to the stock filter) is pretty damn close.
2) Most people like myself buy a replacement drop-in K&N air filter not just for it's reuse-ability, but also for improved throttle response, not for a theoretical HP increase. As a bonus, I usually see a slight increase in fuel mileage with the K&N compared to stock.
"Avoid an oiled filter if there is a MAF behind the air box. Nothing will ruin your day like filter oil on a MAF."
Personally I never re-oil my K&N filters. I just brush off the dirt layer, and when it get's real dirty, I toss it and replace with a new one. To me it's not worth paying the $12.95 for the cleaning/re-oiling kit which is about half the cost of a new K&N drop-in filter.
Two things, 1) An aftermarket performance air filter like a K&N or BMC will flow better than the stock paper air filter...that's fact. A K&N or BMC does not filter as well as the stock filter, but 99.8% filtration (in comparison to the stock filter) is pretty damn close.
2) Most people like myself buy a replacement drop-in K&N air filter not just for it's reuse-ability, but also for improved throttle response, not for a theoretical HP increase. As a bonus, I usually see a slight increase in fuel mileage with the K&N compared to stock.
Last edited by DameMD; Jul 11, 2017 at 12:06 PM.
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From: Mass
2026 GLE 53 Coupe
Fair enough. Now, back to your car application. Since we have forced induction cars that like more air, do "you" feel a better throttle response with the filters on your car? On my last two Mercedes which were N/A, I didn't really see a throttle difference. I did see a 1-3 mpg improvement city driving with K&N's. I am on the fence between BMC and K&N since it seems like more people are using BMC. I wish we had a true CAI or short RAM for our cars like Audi and BMW
Now as for the choice between BMC and K&N, IMO the quality is about the same...with the BMC being slightly better, but at twice the price of the K&N, I don't think the BMC filter is worth that kind of money.
