Will a K&N filter be more efficient at filtering in dusty conditions?

I have a 1996 Lexus LX450 that I use in Luanda, Angola. It spends a lot of time going down dusty, sandy, tracks so I change the air, oil and fuel filters every 5000km. These regular changes are partly due to the harsh environment and also due to the dubious brands of replacement consumable parts available. I have been toying with the idea of getting a K&N air filter as it claims it will last for life and I can clean it at home, but I hear conflicting reports. Some say the K&N will ultimately let more dirt into the engine over time (thus shortening engine life) and that cheap paper filters changed regularly are better. K&N's PR says differently. What do you say?

I say that for these conditions stick to the standard filters. Buy them OEM in quantity when you are in Europe or Japan. The K&N is more efficient for power, if the ECU is remapped to expect more air into the engine. It is not more efficient as a dirt and dust filter.

Answered by Honest John on 10 June 2012

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