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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > Mechanical Maintenance and TSBs: Break-in / Oil & Fluids / Servicing / TSBs and Service Bulletin > Air Filter Replacement
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      12-26-2015, 12:49 PM   #23
davidelectricred
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I've read all the reviews, I ordered my filter today for my '13 335i. Now I am a newbie to this, so when will I know its time to clean and "oil" the filter?
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      07-01-2016, 03:23 AM   #24
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Is there any benefit to getting one of the aftermarket dry filter drop ins vs OEM BMW filter? I figure some of you have had your aftermarket filters in awhile now and have an informed opinion.

The procedure looks straight forward:

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      07-02-2016, 09:41 AM   #25
K320
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Acceleration is better. Response from car is faster because it can breathe more air.
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      07-02-2016, 12:37 PM   #26
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Quote:
Originally Posted by K320
Acceleration is better. Response from car is faster because it can breathe more air.
Which brand dry filter do you have experience with?
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      07-03-2016, 05:29 AM   #27
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Quote:
Originally Posted by K320
Acceleration is better. Response from car is faster because it can breathe more air.
I have a stage 2 afe CAI with the dry filter. Pretty much all the Dynos I've seen show either negligible increase in performance or just a very slight increase. During the winter (well winter in Texas) it seemed like the car did accelerate better but I have a feeling it was just a placebo effect due to the increased noise from the intake (and maybe me trying to justify the purchase lol). This is probably one of the worst mods in regards to dollar per horsepower so if someone wants power, this is not the way to go
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      07-05-2016, 05:31 AM   #28
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Quote:
Originally Posted by rustyminded View Post
I have the afe dry filter, it's very good in my sandy weather and you have to put in consideration K&N is oiled so most oil is sucked up on your MAF and it will be clogged sooner that's for any oiled filter
+1

HP gains.... 0-1 HP

Not worth the effort, unless you just gotta have a mod to speak of
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      07-05-2016, 02:32 PM   #29
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I'm not concerned with placebo HP gains from a drop in filter, rather I wanted to know if the dry filters have any upside to just using the OEM paper filters.
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      07-06-2016, 11:20 AM   #30
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OEM paper is the way to go, ive used an AFE dry before and the car seemed to bog down, the throttle response seemed to lag and surge more. Switched the OEM back and all was back to normal. Ive never had luck with any aftermarket filters on any of my current or 3 previos bmw's
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      07-06-2016, 05:57 PM   #31
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Ive used K&N oiled filters for more the 20 years in various cars, may which have MAFs. As long as you clean and oil it correctly (Not over-oil), I never experienced any issue with the filter or the MAF
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      07-08-2016, 10:18 PM   #32
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I use stock air box with k&n filter. A little more sound and response is better. Mpg is lower.
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      07-08-2016, 10:19 PM   #33
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The torque pro app reports more cfm air.
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