The book "How to select a motor oil and filter for your car or truck" (very good/informative) from Noria Corporation (bookstore at www.noria.com), cites a GM study that showed that engine life can be increased 2.7 times by using an oil filter with a SAE J1858 efficiency rating of 98.7% for particles of 10 micron size as opposed to/compared to using an economy grade filter with an efficiency rating of 98.7% @ 40 microns (150,000 miles for 40 micron filtration vs. 405,000 miles for 10 micron filtration). Efficiency of the air filter is also very important.I've looked/researched and can only find one oil filter that meets recommendation noted above for 405k miles engine life. The Moil 1 Extended Performance oil filter exceeds above recommendations with a SAE J1858 multi-pass efficiency rating of 99.2% @ 10 microns ( http://www.mobiloil.com/USA-English/...l_Filters.aspx ) and (PAGE 2) ( http://theoildrop.server101.com/ubb/...c;f=6;t=003298 ). With less efficiency, the Puralator Pureone is 93.5% @ 10 microns. IMO, based on this study ( http://home.usadatanet.net/~jbplock/ISO5011/SPICER.htm ) the best air filter would probably be Toyota OEM or AC Delco. Who knows, with high efficiency oil/air filters and a high quality synthetic oil, you might get 750k miles before rebuild was needed. Mobil 1 extended performance filters are available at Autozone.

 

thanks for the info...now our trusty yotas can keep going for even longer does the filters efficiency also affect the life of the filter? say...if the filter can pick up more debris, theoretically itll clog faster and all that jazz...

 

All other things being equal, I'd expect a more efficient filter to clog faster, however, the M1 EP oil filter has twice the capacity/surface area of the leading brand, so that would be a non-issue.
http://www.mobiloil.com/USA-English/...l_Filters.aspx

 

I DO understand the concern for oil filter "dirt" capacity, but if you're replacing your filter every 3,000 to 6,000 miles, who cares?

 

How long would it take you to drive 405,000 miles? I drove less than 10,000 miles last year. That included two 1200+ road trips last summer.

 

Capacity for safety, peace of mind, and longer filter change intervals if so desired. Efficiency for long engine life.

 

Good info. How does the Toyota OEM oil filter rank using this method?

 

Where's Amsoil rank?

 

I'd also like to know the Toyota OEM filter specs, but I've been unsuccessful in getting that info from Toyota or elsewhere. I assume they have average filtering ability--sustantially less than the M1 EP.

 

"...AMSOIL EaO Filters provides filtering efficiency to 98.7 percent at 15 microns....per. ISO 4548-12" http://www.amsoil.com/StoreFront/eao.aspx
Amsoil used a different test procedure. Still, M1 EP appears to me to be substantially more efficient with 99.2 % effiiciency @ 10 microns vs. Amsoil with 98.7 % efficiency @ 15 microns.

 

I just bought the TrueFlow airfilter from Jason B. Wish it were included in the test.

 

I was always under the impression that Toyota filters are best for our vehicles.

Fram oil filters go into a blow by mode relativly quickly, and k&n stuff just allows everything through.

 

I would imagine the Toyota OEM filters would be pretty damn good considering Toyota vehicles are known to last quite a long time.

 

I plan to get a used oil analysis (UOA) on oil with a 5,000 mile run using Toyota OEM oil filter and compare it to a UOA on oil with 5,000 mile run using M1 EP filter. Also plan to get/compare some UOA's on some different synthetic oils to find the one that provides least wear. Here's an informative site: http://theoildrop.server101.com/cgi/ultimatebb.cgi?

 

Hey Yota4me2, I think you should do a couple sets of oil analysis just to be fair. For instance do one OEM, then one M1 EP, then another OEM, then one M1 EP, just to be sure, etc.

 

So if keeping particulates low is the goal, changing engine oil frequently and often would be the best, right?

 

you gatta have control groups and such... if youre going to do it, do it right.. have acouple series also over time and with different conditions.

 

That's part of the equation from some of the reading I've done as far as I understand. But the other issue is the oil maintaining it's lubrication properties, and it's viscoscity. For instance some guys who run synthetic oil, just change oil filters at what would be considered a normal oil change interval (for "dino" oil), and then top up lost oil from the filter change and run the oil twice as long as normally would be done. The top up helps (say around half a liter to a liter) freshen the oil up. This also helps keep particulate out of equation, by removing the dirty filter, and since synthetic oil seems to hold it's properities and viscoscity a little better, it shouldn't be an issue.

Personally though, for my truck, I run synthetic and I just treat it like regular oil. Call me anal, call me quirky, call me potentially throwing good oil away, but that's just me I guess.

 

The GM study: all other things being equal, 2.7 times longer engine life by using an oil filter with a SAE J1858 efficiency rating of 98.7% for particles of 10 micron size as opposed to/compared to using an economy grade filter with an efficiency rating of 98.7% @ 40 microns. I take that to mean even if you change the oil & filter every 3,000 miles, you're still getting 2.7 times more wear if you use the average efficiency filter vs. the 98.7+% efficiency @ 10 microns filter.
I agree--the more UOA's with OEM filter vs. M1 EP, the better, for comparison purposes. If I see noticeable improvement with first M1 EP UOA, I'll probably put the filter comparison on hold til I've done some UOA's with some different synthetic oils to find the best oil (based on UOA's I've seen on the BOBISTHEOILGUY site-- Amsoil, Mobil 1 EP, & Castrol Syntec look promising). Then maybe return to the OEM vs. M1 EP filter comparison. I plan to do this on 2 vehicles simutaneously.

 

Might have to add some of this (in 5W-30) to the comparison testing: http://www.toyota.com.my/index.asp?f...rticle&aid=439 and their statemnt on canadian site:http://www.toyota.ca/cgi-bin/WebObje...800012e%2ehtml
UPDATE:
(Toyota synthetic oil) Not available at 2 local Toyata dealers in FL. Can't even order it. One said they use/carry/sell Toyota approved Castrol Syntec 5W-30.