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Seriously. I saw a few oil filter comparison pages in my car days but this guy takes it even farther. I feel better about my Purolater filters now
Oil Filtration Comparisons From the Workbench - Home

Wow a lot of info

I run Wix filters in all my engines!! There the best ones I have found.

I will keep using wix

There top notch filters. Just like oil. Good oil, and good filters keep your engine protected.

Carscw said:

I will keep using wix

Click to expand...

The contaminates??? Plenty of dirt and ground metal is available. Why were they not used? Worn engines develop less pressure. What was the pressure used? How about heat , a critical item in the air cooled engines?

Nevertheless, thanks for the reference. If it gets owners thinking about proper maintenance it is very worthwhile!!:thumbsup:

I didn't expect (or want) to change anybody's preference with that post. Just info. We all like what we like and once it gets ingrained it's hard to change opinion. I still won't buy Fram filters even though reports say they have improved. Somebody mentioned cellulose or some synthetic filter element material. I think most filters have good enough filtering media. It seems to be the rest of the filter.. the construction and housing, that separates the good filters from the bad. Also flow capability measured against filtering quality. I believe that study or another mentioned that some filters are so effective that they filter out some of the important oil additives and even restrict flow too much. Also seems an anti- drainback valve isn't important on a vertical mounted filter. Makes sense. My hydraulic filter is vertically mounted... maybe they all are, I'm new to hydraulics. I'm not returning the new filter just because it has the valve tho
I'm still considering whether to use the Mobil1 cross referenced filter on the hydraulics. Its supposed to be equivalent to the Gravely/Zinco filter but...
BTW I saw a Walmart ad for a clearance sale on Mobil1 M1402EP two packs for $10 if anybody uses that filter.

I use the cheap Chinese aftermarket filter from my supplier,box of 12 for 25.00.:smile:

motoman said:

The contaminates??? Plenty of dirt and ground metal is available. Why were they not used? Worn engines develop less pressure. What was the pressure used? How about heat , a critical item in the air cooled engines?

Nevertheless, thanks for the reference. If it gets owners thinking about proper maintenance it is very worthwhile!!:thumbsup:

Click to expand...

He said it was a simple bench test not a certified test. The kind anyone could do. But I agree there is something to be missed here but none the less its still good information.

Its likely the best testing we're going to get. The people who make the filters aren't going to test and compare comprehensively. Mobil posted some tests they performed against other filters but they used the lower end filters of every company they tested against... and still lost to one. The companies won't even tell you what the micron numbers mean in context. Some will give a micron rating but they don't provide the info that would make the rating really mean something... like the efficiency rating of filtering micron sized particles. Like said... this study just gives some info that may be helpful... more helpful than anything you'll get from the filter companies
Oh wait I take it back... Baldwin filters gives some info.
Baldwin Filters | Product Highlights