I also ordered a K&N drop in filter.
Pros: drop in
Vehicle:
Volkswagen Golf
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Upgrade to a K&N filter and a recharge kit. With a washable filter, you simply pop it out, clean it, let it dry and apply the oil... Pop it back in the vehicle... Good to go! Guess what? You SAVED money!!
Pros: washable, saves money
P.S. this same Toyota dealership told me I needed a new air filter upon which I told him, “It’s a K&N...” he said oh, and walked back into the garage.
Pros: long-lasting, reusable
Vehicle:
Toyota Corolla
Rolled the dice and bought an Amazon Warehouse Chinese cold air intake for $42. Figured the bent aluminum tube was the most crucial part of the set up apart from the air filter so I bought a K&N air filter to replace the crummy one that comes with it. Makes some nice induction noises now.
Pros: nice induction noises
Cons: crummy air filter
I didn't have any kind of smells at all after my Green filter install.
Pros: no smells
Vehicle:
Ford Focus
I have a Green Filter and have never had this problem
Pros: no problems
Vehicle:
Ford Focus
I clean mine in a bucket with simple green, and re-oil with whatever motorcycle filter oil I have on my shelf. I do this once a year. Keep in mind, your filter does basically nothing after all the oil is saturated with dirt.I've had the recharge kits before and simple green is both cheaper and works better. I've been doing this for many years and have never had one degrade, as it is a very gentle cleaner.
Pros: cheap, works well
Cons: filter degrades
I bought the K&N at http://www.martelbrothers.com/customer/knstore.php . It is cheaper about $41 each. I called VW serviceman to make an appointment that I would like to install K&N filters, and he told me anytime.
Cons: hard to install
K&N is one of the worst. I run my engine in dusty conditions and was finding oily, dirty crud in my intake with K&N. I ditched it and went back to paper filters.
Cons: poor particulate catching, oily crud in intake
Vehicle:
Nissan
They are expensive. Expensive to buy, expensive to maintain. For the $75 or so that this filter costs, you can buy a half dozen top quality conventional filters and change them frequently. Price the K&N filter cleaning and recharge kit. For a filter to work, you must clean and re-oil it, not just stick it in and forget it. Following the instructions in the $15 recharge kit, it takes a half hour to do this, adding unnecessary time and expense to your maintenance. It amuses us in the shop where I work when these come in the door. People pay a lot of money for them, but when we try to sell them a cleaning and re-oil service for a visibly clogged filter they usually decline the service, because it is "a lifetime filter". There is no noticeable increase in power, fuel economy, or anything else that could possibly justify the installation. You will notice absolutely no difference afterward, other than you have less money. Go down to your local race track or drag strip and look around; I have *never* seen a $30,000 racing engine with an oil type air filter on it. Incorrect installation or maintenance *can* cause damage to your MAF sensor. GM even had a service bulletin out a few years ago advisiing their dealerships that failed transmissions due to over oiled aftermarket air filters were to be denied under warranty. MAF is a critical input for calculating transmission shifts; apparently contaminated MAF sensors were resulting in slipping during shifts causing failures on new cars that had warranty coverage remainiing. Why risk problems when there is no gain to be had?
Cons: expensive, no power gain, risk of damage
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