LFA951

American K&N is better than German Mahle

pjburges

Has anyone tried secondary bypass filters in the 944?

ninefiveone

And if you read every single study in the last 35 years, it's proven that K&N is no better than a fresh oem air filter. Their oil filters have also been studied and proven to be no better and in some cases worse than stock filters.

Sorry to burst your bubble.

Fishey

Purolator PureOne, is the best on the market for off the shelf filters for our cars. This comes from research based on filter type(Synthetic)/construction/flow. In all sections the PureOne is above all other brands and designs. We can argue all day long about the best filter but PureOne is without a doubt the best from every standpoint.

Fishey

Wrong, Synthetic filters have multiple advantages in the oiling system. We can start with better filtration, Increased flow and end with better durability.

DFASTEST951

What about CM racing oil filters. Anyone hear anything about them?

billthe3

I stopped using K&N oil filters once I figured out they (some) had cardboard in them...

Geneqco

These are the billet aluminium housing and filter setup Lindsey sells. They filter down to 8 microns and have no bypass. They are a quality made unit. I have installed mine but am still finishing off other things on the car so I haven't tried it yet.

I understand they are a high flow sythetic. They also do a fuel filter with similar cartridge that flows 90 gallons per minute! I have the 1 micron version... I'm not sure what they flow but I'm sure it will be plenty.

SchnellerUmsetzer

or a

K&N for $9 at automotion!

ehall

prove it.

attyjeff

I have researched this many times and I have to agree pureone does seem to be the best, but I cant help myself, I still use k&n HP-4001 every now.

ninefiveone

Yes, but none of those attributes have been proven for K&N filters. And I don't mean studies paid for by K&N.

Furthermore, K&N oil filters are paper, like all the others.

KuHL 951

I think there is some confusion here. Fishey was talking about K & N air filters and the thread is about oil filters. The K & N air filters do not filter as small as a clean paper OE filter. It has been shown that the K & N flows more air but they also let more crap into the intake system even when well oiled. Personally I won't use the the oiled type air filters and have removed them off of several cars based upon articles I've read. It probably doesn't matter that much unless you find yourself in really dusty environments like the cinder used on roads in Calif for snow and black ice.

944CS

Great filter, the only "problem" with them is they have no pressure relief bypass, so once you start to see that your oil pressure is lower than normal, it is usually a sign that the filter is beginning to clog with debris. CM states that they should last 10K street miles....however as with most other things that interval varies with driving conditions

Geneqco

I think they designed it deliberately this way so that the filter cannot go into bypass and potentially circulate debris through the oil - of course you have to change the filter as required.

They also filter down to 8 microns as oposed to Purolator PureOne premium product which is stated as 10 to 20 microns on their web site.