Originally Posted By: SuperBusa
Yes, that all makes sense ... but the fact still remains that Ford/Motorcraft could do much better in the spec department. That is the focus. It would be like GM saying: "We designed this ZR1, and made it to do
at least 90 MPH and pull
at least 0.35 G in the corners." But they never come out and say just how good it really is. Maybe Ford will do that for their new Shelby Mustang.
It's a significant shortcoming ... they could do much better. Nobody should have to go to Purolator for the answer ... it's Motorcraft's filter. Besides, probably not many, except BITOG nuts would even know Purolator makes their filters.
The thing is, car manufacturers have fudged the data on their vehicles for decades, and continue to do so. Remember how the 426 Hemi was rated for 425 hp? Few will dispute that they actually had significantly more power than that. Every high performance JDM car in the 1990s had exactly 276 hp. Who believes that? Porsche routinely lowballs its performance figures. Ford did the same with the SVT Lightning.
Specifications are important, and I wish Motorcraft published the actual specifications. For whatever reason, they've chosen not to do that. Perhaps Motorcraft considers it not worth the effort to regularly update publications and websites with actual specifications of such things. Perhaps the people that use the Motorcraft website are more interested in obtaining cross reference information, filter dimensions, thread information, and application data.
That being said, how accurate is the data provided by other manufacturers? If their filters are 97%, could they be better? Is that their minimum? Their average? If one really wants to be picky about specifications, any mathematician or physicist will tell you that the data point (i.e. the efficiency) is useless without the error bar. Is it 97% +/- 1% (which would fit with significant figures reported)? Is it 97% +/- 10%, 20%, 30%, or what? You and I know perfectly well that a figure of 97% does not mean exactly 97%, nor does it mean 97% all the time, in every filter off the assembly line.
Can we trust the specification? Company X says their filter is however efficient at so many microns. Can they show me? Can they show me how reproducible it is?
I use Motorcraft filters with confidence. One needs to just apply a little common sense.
Motorcraft filters are made by Purolator. I trust Purolator filters, so I have no reason to mistrust Motorcraft filters. I trust Wix filters, so if they manufactured Motorcraft filters, the same would apply. I (rightly or wrongly) don't trust Fram filters, so if they started making Motorcraft filters, I'd steer away from them.
As others have pointed out, I sincerely doubt that Purolator would manufacture an 80% efficiency medium just to put in Motorcraft filters, and then use vastly different media for their Classics. It wouldn't make economic sense to have three or more (because of the ratings in the 50% and 60% range shown, too) types of filter media manufactured, when two (Classic and PureOne) would do.