Extended oil change intervals impact on Wear

[Japanese]

A lot of people assume that 3000 mile oil changes will double the engine life compared with 6000 mile oil changes but it simply doesn’t work that way.

Most people on here still change their oil too often…

Yes, for conventional oil that's the limit. For group III oils is a bit early but won't hurt. I'm talking about the Walmart oils.

 

[Mephy]

Please help me understand. I’ve heard multiple times that a lot wear is from <15 micron particle size, which is mostly not caught by oil filters. Yet it seems like many people are confident in going extended oil change intervals just knowing the oil stays in grade and fuel dilution.

Does the wear rate not accelerate the longer oil is run, and why?

Take into consideration that the oil filter, as it ages, increases its filtration capability.

 

[WarEagle]

Take into consideration that the oil filter, as it ages, increases its filtration capability.

This is incorrect. @ZeeOSix, and others, has posted numerous times disproving this myth.

 

[ZeeOSix]

Take into consideration that the oil filter, as it ages, increases its filtration capability.

Oil filters lose efficiency as they load up with debris. Read the end of this thread where the link jumps into it ---> LINK

Oil filter testers as far back as 1965 (SAE 650866) saw that oil filters lost efficiency as they load up, which disproved the "cake theory" that most people cling on to. The "cake theory" only works with air filters and similar, so people try to bridge that over to oil filters, which puts them in to the long standing misconception that oil filters get better with debris loading.

 

[Mephy]

I did not read yet the link that you posted, I try to give my explanation I might be wrong. The efficiency is the ability to filter + the flow rate.For sure when the filter ages the flow goes down but the size of particulates that can filter should be better since the micro pores of the filter get smaller.

 

[WarEagle]

I did not read yet the link that you posted, I try to give my explanation I might be wrong. The efficiency is the ability to filter + the flow rate.For sure when the filter ages the flow goes down but the size of particulates that can filter should be better since the micro pores of the filter get smaller.

Oil filters are not like air filters. Definitely read @ZeeOSix posts on the subject. It was enlightening for me

 

[ZeeOSix]

I did not read yet the link that you posted, I try to give my explanation I might be wrong. The efficiency is the ability to filter + the flow rate.For sure when the filter ages the flow goes down but the size of particulates that can filter should be better since the micro pores of the filter get smaller.

The part in bold is wrong and the misconception a lot of people believe. Oil filters do not behave that way, but air filters do and that's the misconception bridge that people build. Go read that thread I linked to.