I said it's less efficient than the regular WIX filters
Who said I was "worried" about it. You claim its got top of the line efficiency ... I said it doesn't. Simple as that. You obviously never got any "inside info" from "Leroy" or "Bubba".If you are so worried about it, why not hire a lab to run some tests?
Maybe you want to believe the worst, as in Wix purposely made what should be their best filter to be subpar?
Basing this reasoning on the manufacturer not publishing performance data is silly
That's like saying the new Corvette is subpar just because GM isn't publishing performance data
So, we're still waiting on you to prove this claim View attachment 49635
"Proprietary" ... top secret ... don't really want any consumers to really know the specs.I wonder what Mann & Hummel would say?