I remember the gravity oil flow tests….Early members of the forum will remember that Bob always felt as if flow was more important than filtration, even to the point where he ran an interval or two with no oil filter!I always disagreed with him about that one
Toyota oil filters
- Thread starter dbvettez061
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Toyota sells cars in Alaska, the restriction is very important there. On filtration he uses a concentrated test dust, not like an engine normally sees.
I’ve made this comparison before, throw three golf balls up in the air at a putting green, all will probably get stuck on the green. Throw 500 up in the air and probably one will find the hole. The test results are skewed to high particle concentration.
Some filters like the Tokyo Roki and other Japanese brands have an excessive amount of holes in the media. I wouldn’t use those even sticking to the golf ball theory. It’s too many holes.
Bet the PD oil pump was pretty happy it was working 0.01 HP less with no oil filter to over come, lol.Early members of the forum will remember that Bob always felt as if flow was more important than filtration, even to the point where he ran an interval or two with no oil filter!
Mandatory to run a "high flow" Toyota filters in Alaska to prevent engine failure.
Yet, every filter brand is used on vehicles in Alaska.ISO 4548-12 must have replaced the golf ball throw and backlight on the media test standards. ISO 4548-12 also uses concentrated levels of test dust, yet it's been shown that there's a very good correlation between controlled lab oil filter efficiency testing and oil cleanliness and corresponding wear rates in real engines.
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Toyota has to sell the parts it thinks best for all conditions.Mandatory to run a "high flow" Toyota filters in Alaska to prevent engine failure.
ISO 4548-12 must have replaced the golf ball throw and backlight on the media test standards. ISO 4548-12 also uses concentrated levels of test dust, yet it's been shown that there's a very good correlation between controlled lab oil filter efficiency testing and oil cleanliness and corresponding wear rates in real engines.
The only way I can think of for efficiency in reality is to change the filter and see which filter wins using the same oil, engine, and use.
It's much easier to compare official ISO 4548-12 specs to see which filter wins ... just like Ascent did with his comparison of 5 different filters specified for the same engine. That's the main reason that ISO 4548-12 was invented and used internationally. There have already been expensive controlled tests done in the field for engine wear tests that show there was less wear with the more efficient oil filters. What more do you need to realize that more efficient filtration leads to cleaner oil, which leads to less engine wear.
So does every other big filter designer and manufacturer. That's why they are within a small range of PSI difference in dP with hot oil a 10 GPM of flow. With cold oil, most are going to go into bypass at a pretty low flow rate (like around 2.5-3 GPM), just like BR shows - that's why it's a good idea to keep the engine RPM down until the oil warms up pretty good. And keep in mind that the PD pressure relief will be kicking in at a lower RPM too.
When the oiling system is typically 15 times more restrictive than the oil filter, a few PSI of dP from the oil filter really isn't going to matter with the PD oil pump. No engine is going to be damaged because the oil filter has 3 more PSI of dP vs another oil filter.
Genuine Toyota (Denso made) N1 filters can be bought at the dealer at 1/2 the price of other aftermarket brands online. Since i prefer more frequent DIY engine oil and filter changes rather than extended drain interval, i have consistently used factory filters
Half the price wouldn't make me go for them ... "ROI" doesn't exist much in my filter buying decisions - and of course everyone has their own reasons for buying and using what the decide on. I use to run Toyota filters on my Tacoma until I found much more efficient filters. Plus I didn't like the can marring the filter mount because of the base P-gasket.
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Yes real world resultsWe know what the data that's available shows they aren't. If they were such good efficiency then Toyota would probably publish it. Only OEM I've ever seen publish a filter efficiency is Motorcraft. But of course there are those two Toyotas that went 1M miles, so they must be "good enough".
As already said, many factors get a vehicle to 1M miles. The main one in that Toyota's case was the use conditions of mainly constant highway miles. That doesn't automatically mean that oil filter efficiency will never make any difference in engine wear. Every wear study shows that better oil filtration keeps the oil cleaner which results in less engine wear.
How do you get a vehicle to 1M miles without mainly highway miles?
Drive it longer.
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Doesn't really matter. Those Toyota Tundras were exposed to dirt and road debris just like any other car on the road
The fact that it was mostly easy highway miles is a big factor. If that was 1M miles of severe use where the oil would be more contaminated, do you think a low efficiency oil filter would still make no difference over the long run in the mechanical health of the egine? Show me a wear study where it's proven that there is no increased in wear when the oil is dirtier.
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Show me a vehicle that went a million miles using just "high efficiency" oil filtersBut it used high efficiency oil filters.
Drive it longer.
And live longer
So you think using a high efficiency oil filter wouldn't allow it to make it to 1M miles?, lol. Like said, based on the use conditions that factor into debris generation into the oil, a higher efficiency filter would keep the sump cleaner and therefore result in less wear over the long run. So in that case, the engine at 1M miles could certainly be in better mechanical health than if a low efficiency filter was used. Oh but wait, it might get T-boned tomorrow so it doesn't really matter.