Yeah guess all those MAF sensor I replace due to K&N's is a fluke.Many state clearly in there manual that no oiled air filters are to be used for this very issue.
Give it about 1 week and the PCM will learn around that filter and you will be back at the same power and mpg's anyways.You also will notice in about 2-3 oil changes that your oil is alot dirter then it used to be also,that is all the dirt it allows into the engine that a non-oiled filter actually traps.
I can't speak to your specific cases, but I've used K&N oiled filters in many vehicles for extended periods of time with great results and no problems.
Did you check out the links I posted previously? Here is what K&N does when they get a MAF sensor that has failed and it was suspected that their filter was the culprit:
"When K&N obtains a MAF sensor in question, our laboratory technicians:
• Inspect it under a microscope to screen for contamination that may be present
• Electrically test for MAF sensor failure by confirming output calibration readings.
• Perform chemical analysis of sensors to determine the source of the contamination where any is present.
• Audit chemical analysis through work with an independent laboratory.
• Interact directly with the dealership involved to supplement with additional facts."
I could be wrong but I'm pretty sure dealerships or local mechanics don't perform that detailed of an analysis. They see the K&N filter and immediately decide it's the problem.
Here's the link to their findings. A very interesting read:
Here's their consumer protection pledge:
"We want to make sure that when you buy a K&N Lifetime Air Filter or Air Intake System, you can be confident your vehicle's warranty will not be impacted. We also want you to feel confident that even if you experience a difficult dealership, we will step-in and resolve the issue, so you won't have to. Therefore, we make the following Pledge:
K&N pledges to our customers that they will not be taken advantage of and charged for a repair due to a dealership warranty denial blamed on the presence of a K&N product.
Steven Rogers, CEO
Consumers buy aftermarket products for many reasons; higher quality, added performance, visual appeal, work requirements or just as a way to be different. The Car Companies do not like aftermarket products and never have. They believe consumers should only buy their parts. There is a battle going on for your freedom of choice and that freedom is being threatened by a number of wolves dressed in sheep’s clothing. Be it in the name of emissions standards, public safety, warranty requirements, or dependence on foreign oil, all these worthy causes may be used as a reason to reduce your right to choose and force you to buy only O/E Parts. That’s why on virtually every aftermarket company's web site; you will see a reference to the Magnuson-Moss Warranty Act, a law needed to protect your right to buy non-O/E parts. There has even been a bill introduced recently in Congress called the “Right to Repair Act,” a bill designed to protect your right to have your vehicle serviced by an independent repair facility.
A frustrating problem we occasionally face is service technicians making false or unsubstantiated claims about aftermarket products, even something as standard as a K&N air filter going in the factory air box. These false allegations may then be used as a reason to deny a legitimate warranty claim and force a consumer to pay money when they should not. We are horrified that the presence of aftermarket products could in rare instances be used as an excuse for taking advantage of a consumer. In all instances we have experienced so far, the dealership’s position is mere speculation unsupported by any evidence. However, the dealership is in the “power position” and more often than not, they will win this unfair fight with a consumer, who needs their vehicle back. We are going to balance the scales a bit. We will use our resources to make the consumer whole and challenge the dealership. See warranty page for details."