Amazon has
Purolator PBL14476 PurolatorBOSS Maximum Engine Protection Spin On Oil Filter for
$4.
Shipping is free w/ Prime or on $35+ orders.
Thanks to Community Member
jjstewart8 for sharing this deal.
Note: estimated delivery is May 14 - 27 for Prime members
About this Product:
- Provides maximum engine protection for up to 20,000 miles
- SmartFUSION full synthetic media delivers over 99% Dirt Removal Power
- PuroSEAL gasket made from ethylene acrylic for maximum leak protection and life expectancy
- Silicone anti-drainback valve protects against dry starts while a double-helix metal center tube and heavy duty BOSS steel casing withstands extreme pressure and optimizes oil flow
- Compatible with select models from Chevrolet, Daihatsu, General Motors, Pontiac, Scion, and Toyota
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https://bobistheoilguy.
https://bobistheoilguy.
https://bobistheoilguy.
Actual testing of the Purolator Boss is in video #2, but from #4 onward they have a ranking of all the ones they tested. Granted their rankings are based on a weighted average, but they put the Boss as 1st place.
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Actual testing of the Purolator Boss is in video #2, but from #4 onward they have a ranking of all the ones they tested. Granted their rankings are based on a weighted average, but they put the Boss as 1st place.
https://bobistheoilguy.
Yeah, we don't really pay attention to those guys. What efficiency did they rate the Boss at? I can't watch the video due to network. There have been some rumors that the efficiency has increased over the last year or so but it's still not at the top 2-3 filters.
They measured all the filters in filtration ability (how many particles came through at different sizes), and I think that's what the other post was calling efficiency. They also measured pressure differential at high temp and at cold temp, and how much dust could be captured before the pressure differential increased by 8 psi. After 20 different filters, they rated the Boss at #3 for filtration/efficiency (50% weight), #8 for hot flow/pressure loss (20%), #2 for cold flow (20%), and #3 for capture capacity (10%) for an overall first place. Next on their list was #2 Amsoil (rated #1 in filtration) and #3 FRAM Endurance (#2 in filtration), but both of these had significantly worse flow rates and capacity.
They were using home assembled equipment, not highly-calibrated scientific testing machines, though they did use all the official ISO 4548-12 test liquids and solids. Particle counts were determined from an official oil testing lab. It's not going to be the same as the official ISO test, but then testing isn't the same as real-world performance. I'm just a shadetree mechanic for my own cars, but personally I think they made a pretty good case for their relative rankings.
Round Punched Holes: Common in many standard filters, these are clean, circular holes punched into the steel center tube, often seen in brands like Fram and Mann.
Louvers (Slits/Slotted): These are thin, often directional slits that appear partially punched or "stamped" out. They are often favored for providing a large total open area, allowing good flow.
Spiral Punched: Some filters (e.g., Hastings) use a spiral pattern of half-round punched openings, which are reported to be structurally very strong.
Plastic/Nylon Cage (Ecore): Some modern filters use a plastic cage structure rather than metal, designed to provide high flow.
The OEM Toyota filters right now use the round punched holes which give excellent flow due to the filters being so small. Most locations sell the OEM for $5 if you buy 3 or more so not much a price difference going OEM.
These Purolator filters use the Louver type and in the past the QC was so bad that some filters came mostly closed. You can find videos talking about this. I order a few months ago and they seem to have fixed that issue but it does not hurt to double check the ones that you do receive.
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Oh that sucks.
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They measured all the filters in filtration ability (how many particles came through at different sizes), and I think that's what the other post was calling efficiency. They also measured pressure differential at high temp and at cold temp, and how much dust could be captured before the pressure differential increased by 8 psi. After 20 different filters, they rated the Boss at #3 for filtration/efficiency (50% weight), #8 for hot flow/pressure loss (20%), #2 for cold flow (20%), and #3 for capture capacity (10%) for an overall first place. Next on their list was #2 Amsoil (rated #1 in filtration) and #3 FRAM Endurance (#2 in filtration), but both of these had significantly worse flow rates and capacity.
They were using home assembled equipment, not highly-calibrated scientific testing machines, though they did use all the official ISO 4548-12 test liquids and solids. Particle counts were determined from an official oil testing lab. It's not going to be the same as the official ISO test, but then testing isn't the same as real-world performance. I'm just a shadetree mechanic for my own cars, but personally I think they made a pretty good case for their relative rankings.
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