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Amsoil EaAU vs. AFE Pro Dry S Filter? #5235848 10/10/19 12:14 PM
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krazi3azn Offline OP
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Seeing if anyone has experience with these two filters. Want more flow in my car.

Amsoil is cheaper but website states it is not washable but can be cleaned. Also should be replaced every 4 years or 100k miles

Afe is washable and reusable. But another website states it can only be cleaned so much before replacement is needed.

Product im specifically looking at
AMSOIL 4075
Afe 21-90096

Also i believe the amsoil is a bigger filter

Re: Amsoil EaAU vs. AFE Pro Dry S Filter? [Re: krazi3azn] #5235865 10/10/19 12:28 PM
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kschachn Offline
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Are you getting insufficient flow now?


1994 BMW 530i, 246K
1996 Honda Accord, 280K
1999 Toyota Sienna, 420K
2000 Toyota ECHO, 284K
Re: Amsoil EaAU vs. AFE Pro Dry S Filter? [Re: krazi3azn] #5235888 10/10/19 12:47 PM
Joined: Dec 2011
Posts: 6,700
rooflessVW Online Content
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I ran an aFe Pro Dry S on both my 911 and Q7 with no complaints. Both were very well constructed and fit perfectly. Intake tracts remained spotless.


"Zed's dead baby, Zed's dead."
Re: Amsoil EaAU vs. AFE Pro Dry S Filter? [Re: krazi3azn] #5235894 10/10/19 12:51 PM
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d00df00d Offline
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welcome to BITOG!

I second kschachn's question. Do you know for sure that your current filter is a point of restriction?


2008 BMW M3 Sedan 6MT
Re: Amsoil EaAU vs. AFE Pro Dry S Filter? [Re: kschachn] #5235983 10/10/19 02:09 PM
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krazi3azn Offline OP
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Originally Posted by kschachn
Are you getting insufficient flow now?


Yes, I have a deleted 335d (diesel) with a oiled K&N drop in filter. A few other owners said they added the afe and significantly reduced the amount of smoke from the car.

Reason im looking at the amsoil is because its cheaper (member discount), easier to obtain and there is a local store. Just seeing if AFE is significantly better or more or less the same.

Originally Posted by d00df00d
welcome to BITOG!

I second kschachn's question. Do you know for sure that your current filter is a point of restriction?


Thank you! Been a long time lurker

Last edited by krazi3azn; 10/10/19 02:27 PM.
Re: Amsoil EaAU vs. AFE Pro Dry S Filter? [Re: krazi3azn] #5236016 10/10/19 02:39 PM
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d00df00d Offline
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Originally Posted by krazi3azn
Originally Posted by kschachn
Are you getting insufficient flow now?


Yes, I have a deleted 335d (diesel) with a oiled K&N drop in filter. A few other owners said they added the afe and significantly reduced the amount of smoke from the car.

Reason im looking at the amsoil is because its cheaper (member discount), easier to obtain and there is a local store. Just seeing if AFE is significantly better or more or less the same.

Those testimonials on the aFe: were they comparing vs. the stock filter, or a K&N drop-in? Or both?

What's the relationship between smoke and air filter flow rate?


2008 BMW M3 Sedan 6MT
Re: Amsoil EaAU vs. AFE Pro Dry S Filter? [Re: d00df00d] #5236028 10/10/19 02:51 PM
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krazi3azn Offline OP
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Originally Posted by d00df00d
What's the relationship between smoke and air filter flow rate?


Comparing to stock air box in general, with and without K&N. More flow rate means more diesel burnt which in return less smoke at WOT.

Last edited by krazi3azn; 10/10/19 03:07 PM.
Re: Amsoil EaAU vs. AFE Pro Dry S Filter? [Re: krazi3azn] #5236280 10/10/19 07:40 PM
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kschachn Offline
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Originally Posted by krazi3azn
Comparing to stock air box in general, with and without K&N. More flow rate means more diesel burnt which in return less smoke at WOT.

Help me out, diesel engines don't have a mass air flow sensor? What kind of car do you have and what year?


1994 BMW 530i, 246K
1996 Honda Accord, 280K
1999 Toyota Sienna, 420K
2000 Toyota ECHO, 284K
Re: Amsoil EaAU vs. AFE Pro Dry S Filter? [Re: kschachn] #5239958 10/15/19 08:10 AM
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A310 Offline
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Originally Posted by kschachn
Originally Posted by krazi3azn
Comparing to stock air box in general, with and without K&N. More flow rate means more diesel burnt which in return less smoke at WOT.

Help me out, diesel engines don't have a mass air flow sensor? What kind of car do you have and what year?


Newer diesels do have mass air flow sensors.:)


2009 Ford F-350 (Detroit 4-53T)
2000 Ford Excursion (Triton V10)
1993 Dodge D250 (Cummins 6BT)
Re: Amsoil EaAU vs. AFE Pro Dry S Filter? [Re: A310] #5240015 10/15/19 08:49 AM
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d00df00d Offline
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Originally Posted by A310
Originally Posted by kschachn
Originally Posted by krazi3azn
Comparing to stock air box in general, with and without K&N. More flow rate means more diesel burnt which in return less smoke at WOT.

Help me out, diesel engines don't have a mass air flow sensor? What kind of car do you have and what year?


Newer diesels do have mass air flow sensors.:)

I think kschachn was actually pointing that out in his post. In other words, doesn't OP's car have a MAF? The idea would be that a marginally more or less restrictive intake filter shouldn't affect combustion quality much because the engine would use the MAF to adjust for the actual flow rate.


2008 BMW M3 Sedan 6MT
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