DaveInDenver
Rising Sun Ham Guru
Watching a video discussing oil filter prefilling. You know, where you pour as much oil into the filter as you can before you install it under the assumption that an empty filter will starve the engine for a few seconds until it fills up.
This is the video. I don't know the fella, it was a suggested video by Youtube.
View: https://www.youtube.com/watch?v=AQ_Gt0yPlO0
He's kinda of OCD and perhaps on the spectrum, almost certainly ADHD. The jump cuts and all that.
In any case, this is something that I've always done going back to helping dad as a wee lad. It's also bugged me for a long time since oil filters on the 22R are horizontal and 1GR are inverted. So prefilling isn't really even an option. I still do pour a bit in under the thinking that wetting the medium surely has to be good.
This dude's conclusion: It doesn't matter.
Now I'm not going to say his theory and testing were flawless. It's just a guy doing 50 oil changes in his shop. Better methodology might be more used oil analysis to eliminate testing errors or maybe tear down each filter to gather debris. I doubt those things would change his conclusion regarding bearing wear and oil starvation.
The reason for the thread is he made a few points that got me to thinking.
One is prefilling does introduce a risk of contamination that I'd never considered. By exposing the filter and dumping oil in the center you may get debris inside that is immediately pushed into the lubrication system. Hmm, yeah, interesting. I'd think low risk but still not zero. Toyota ships the filter with a plastic cover on it and waiting until you're over the engine to pull it off without a doubt about as clean as you can be.
Second is his argument boils down to a few seconds of bearing wear during oil changes is inconsequential to engine life overall. It's rings and cylinder walls that take the brunt. And you know, that also is probably true. How many times can you really think back to having your own engine spin a bearing? And when that did happen how often can it be traced back to coolant contamination from a blown HG or something like that?
I may have to rethink my resistance to go beyond 5K intervals. Am I actually doing more harm than good? Say it ain't so.
What I thought was interesting was the SAE studies he shows that link engine wear to operating termperature. The vast majority of wear occurs not at start-up strictly but during warm up. The damage didn't just stop once oil pressure built but until the coolant temperature reached 160°F and was highly correlated to engine load (not just RPM).
And there, what I thought was really interesting was a short statement he made. During one of the SAE experiments the researchers where able to control the engine temperature, presumably by externally cooling the coolant. They found when they took a warmed up engine back to cold while it was running the wear indicators started to increase again.
So the key to keeping your engine happy is to start it, let it idle long enough for oil to circulate, then drive it with as light of load (even high RPM, just as long as you drive as though you have an egg under the throttle) as you can until it gets warm. The rest of it is old and probably passed down generational-but-wrong wives tales.
This is the video. I don't know the fella, it was a suggested video by Youtube.
View: https://www.youtube.com/watch?v=AQ_Gt0yPlO0
He's kinda of OCD and perhaps on the spectrum, almost certainly ADHD. The jump cuts and all that.
In any case, this is something that I've always done going back to helping dad as a wee lad. It's also bugged me for a long time since oil filters on the 22R are horizontal and 1GR are inverted. So prefilling isn't really even an option. I still do pour a bit in under the thinking that wetting the medium surely has to be good.
This dude's conclusion: It doesn't matter.
Now I'm not going to say his theory and testing were flawless. It's just a guy doing 50 oil changes in his shop. Better methodology might be more used oil analysis to eliminate testing errors or maybe tear down each filter to gather debris. I doubt those things would change his conclusion regarding bearing wear and oil starvation.
The reason for the thread is he made a few points that got me to thinking.
One is prefilling does introduce a risk of contamination that I'd never considered. By exposing the filter and dumping oil in the center you may get debris inside that is immediately pushed into the lubrication system. Hmm, yeah, interesting. I'd think low risk but still not zero. Toyota ships the filter with a plastic cover on it and waiting until you're over the engine to pull it off without a doubt about as clean as you can be.
Second is his argument boils down to a few seconds of bearing wear during oil changes is inconsequential to engine life overall. It's rings and cylinder walls that take the brunt. And you know, that also is probably true. How many times can you really think back to having your own engine spin a bearing? And when that did happen how often can it be traced back to coolant contamination from a blown HG or something like that?
I may have to rethink my resistance to go beyond 5K intervals. Am I actually doing more harm than good? Say it ain't so.
What I thought was interesting was the SAE studies he shows that link engine wear to operating termperature. The vast majority of wear occurs not at start-up strictly but during warm up. The damage didn't just stop once oil pressure built but until the coolant temperature reached 160°F and was highly correlated to engine load (not just RPM).
And there, what I thought was really interesting was a short statement he made. During one of the SAE experiments the researchers where able to control the engine temperature, presumably by externally cooling the coolant. They found when they took a warmed up engine back to cold while it was running the wear indicators started to increase again.
So the key to keeping your engine happy is to start it, let it idle long enough for oil to circulate, then drive it with as light of load (even high RPM, just as long as you drive as though you have an egg under the throttle) as you can until it gets warm. The rest of it is old and probably passed down generational-but-wrong wives tales.
