At one point K&N motorcycle oil filters were coming apart inside. Maybe they're better now but I won't use them. I generally use OE filters.
2019 F150 SuperCrew Long Bed w/ 5.0 Coyote, 75k miles.. I drive a pretty consistent route and pretty consistent days and was averaging right at 16.5mpg combined while running my dealership's 5w20 synthetic blend (supposedly). I switched to Pennzoil's Ultra Platinum 5w-30 full synthetic in May, and not only does it run much quieter, the Average is up to 17.5mpg w/o resetting the dash (so the real MPG is higher). I have never had a change from Dino or Blend to Full Synth have such a profound effect before (if at all), but there is something going on here and it shouldn't be the weight change as the Ultra's viscosity is barely in the 30 range, so barely more than a Blended 20.I've had my truck for several months now and have put 15,000 or so miles on it. I got it with around 25,000 miles and am up to about 42,000 now. The whole time I've had it I've gotten around 16.5 MPG empty and around 12.5 on an average hauling trip. I had the dealership change the oil until it got out of the 36,000 mile warranty and I did my own at around the 40,000 mark. Immediately after changing the oil my unloaded average is up to a little over 19mpg and my haul has bumped up to a little over 15mpg. I took an unloaded trip with my wife that was about 600 total miles and we got almost 22mpg. Seems rather odd to me? I used Rotella T6 and an Autozone K&N filter. The immediate change makes me think the oil caused better fuel economy but I have never heard of that before. What say you?
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Rain and even high humidity causes resistance. I notice that also. Even when flying, fuel consumption increases in those conditions
More likely the moisture in the air. It reduces the amount of air, and thus oxygen, being used in the combustion process.
You got that right. K&N has been trying to break into big truck air filters for a while now (as in Class 7-8 diesels but the owners as well as companies won't use them. They refer to them as 'dirty air' filters.
For all of K & N's claims their air filter products usually lose on a dyno to a cheap paper element and then also pass a lot of particulate right into the engine.
Especially when new or just cleaned and re-oiled. In reality, a K&N filters best when filthy dirty. I know, I used to sell them to the hot rod crowd and they kept them clean which isn't the correct thing to do. Guess they liked seeing the red filter oil. They do make good oil filters however but are a bit on the costly side. Guess you have to pay extra for the spot welded on nut on the end...lol
Their claim to fame is not clogging with dust as readily as paper or oiled foam filters under severe conditions. Instead they let some through. That's ok for desert racing where finishing a race is more important than preserving the engine long term. But not for normal use.
