Toyota oil filter light leak

[dnewton3]

Discussion = good.
Bickering = bad.
Knock it off or the thread gets locked.

 

[Glenda W.]

You guys sure like to argue! It really is not a big deal, in the 1950's lots of car makers didn't even run oil filters on their engines. Who cares if they leak. As I said, Toyota prefers loose, leaky engine oil filters, they last sometimes 300,000 or more miles like that sometimes.

I really like the OEM vs High Efficiency debate. I can see both sides. Personally I choose filters that are high efficiency and high flow so I get the best of both worlds.

Now paying a premium for a “high efficiency” filter that has poor craftsmanship and defects is another debate…

 

[Faawrenchbndr]

One reason Toyota oil filters irritate me. I will post this flashlight test, several filter companies use this style of bypass valve built into the leaf spring, It makes no sense to me that oil filter companies keep using this design, knowing unfiltered oil will go through, even with a brand new unclogged oil filter.

So to get back to the original topic of this thread….

A question was brought up as to why the filter companies use this style of leaf spring for the bypass valve.

This question is answered rather easily, it’s all about the cost. It’s very simple for a stamping machine to produce a leaf spring. While a coil spring is a better design, it’s manufacturing ease and overall cost that keep the flawed design.

 

[Faawrenchbndr]

I really like the OEM vs High Efficiency debate. I can see both sides. Personally I choose filters that are high efficiency and high flow so I get the best of both worlds.

Now paying a premium for a “high efficiency” filter that has poor craftsmanship and defects is another debate…

Very insightful and I completely agree.

Let me ask you this, if you had to pick only one of those two attributes, which side of the fence would you be on? High efficiency or high flow?

 

[Glenda W.]

Very insightful and I completely agree.

Let me ask you this, if you had to pick only one of those two attributes, which side of the fence would you be on? High efficiency or high flow?

Great question. I guess since I only do 5k oci’s I’d still go high efficiency knowing it won’t load up.

 

[ZeeOSix]

Let me ask you this, if you had to pick only one of those two attributes, which side of the fence would you be on? High efficiency or high flow?

What filters have so much dp vs flow that it's going to make an engine not receive adequate oil flow and lubrication? If you compared 10 oil filters with hot oil, and the dP at 8 GPM was only +/ - 2 or 3 PSI from the group average, then the flow difference when the DP pump is in relief won't really matter.

Also, just because a filter is lower efficiency doesn't automatically mean it has a lower dP vs flow curve.

 

[The Critic]

Probably a big factor on why the Toyota filters aren't very high efficiency.

That may or may not be true. Toyota updated the media about two years ago:

Thread 'New Toyota Oil Filter Media'

Jul 4, 2023

I heard Toyota switched to a different type of media on their oil filters. Copy of the bulletin is attached.

I opened a new box I just received…and sure enough, the media is now a reddish brown color.

• The Critic
• Replies: 28
• Forum: Engine Oil Filters

• 
• 

 

[Jetronic]

What filters have so much dp vs flow that it's going to make an engine not receive adequate oil flow and lubrication? If you compared 10 oil filters with hot oil, and the dP at 8 GPM was only +/ - 2 or 3 PSI from the group average, then the flow difference when the DP pump is in relief won't really matter.

Also, just because a filter is lower efficiency doesn't automatically mean it has a lower dP vs flow curve.

there's this tsb for GM ecotec engines (1.5 and 2.0 I believe) where it's stated the bypass should not open below 15 psi dp, or you get extra wear. That wouldn't matter if the dp in reality was only 2-3 psi. But a leaky bypass valve sure would matter.

Anyway I chose a filter with a coil sprung bypass valve and +20 psi opening pressure and have now found a longer filter aswell from the same manufacturer

 

[ZeeOSix]

That may or may not be true. Toyota updated the media about two years ago:

Looks like the bulletin is only for some specific cartridge filters ... not across the line. Who knows what the efficiency is of that media, doubt it's going to be drastically more efficient.

 

[ZeeOSix]

there's this tsb for GM ecotec engines (1.5 and 2.0 I believe) where it's stated the bypass should not open below 15 psi dp, or you get extra wear. That wouldn't matter if the dp in reality was only 2-3 psi. But a leaky bypass valve sure would matter.

I was talking about the dP vs flow performance of the media itself, not the bypass valve. The bypass valve should be set according based on the expected dP vs flow with full loading and max oil flow conditions.

 

[Jetronic]

I was talking about the dP vs flow performance of the media itself, not the bypass valve. The bypass valve should be set according based on the expected dP vs flow with full loading and max oil flow conditions.

but in a given application the dp IS determined by the filter media= size and flow

 

[ZeeOSix]

but in a given application the dp IS determined by the filter media= size and flow

Of course, never said it wasn't. I said the bypass valve needs to be designed in accordance with the dP vs flow performance of the media, under the expected max dP situation of max expected flow and loading capacity. The goal of the bypass valve is to only open when it really needs to open. And the media cartridge itself needs to be designed to have a decent dP vs flow performance curve to start with. That's based on the design of the media itself, and the total media area of course. Increased media area helps both dP vs flow performance and holding capacity.

 

[haggler]

I don't think light has the same viscosity as oil, even 0w8.

 

[Gravity]

Lol even with all these little light leaks and porous media these Toyotas will still go a million miles

 

[ZeeOSix]

Hot oil still thin enough to flow well in a decent sized leak gap.