Engine wear?

[crazycrak]

Im just wondering all these brands claim that their oil wears less than the other I mean it looks as if syns keep and engine clean for a longer OCI than dino but I have saw engines running dino for 150K miles and be spotless inside.
but really does syn cause less wear than a dino.

 

[Rand]

My take on that loaded question is... YES syn oil does produce less wear.

however, dino usually causes so little wear as to make the different minuscule except in extreme conditions.

this question has been discussed to death on this site.

 

[crazycrak]

like extreme cold the dino wouldnt flow as well and in turn cause more top engine wear. and in extreme heat like high hp tight clearance engines wear the dino would shear down sooner.
but as far as normail everday temp and normail factory spec engines there would be almost no diffrence.
as long as there was a reasnable OCI

 

[webfors]

the largest benefit of syn is extended oci. Dino, at reasonable oci's will usually result in a perfectly clean engine under the right circumstances. Meaning, put dino SM oil in a modified high pressure turbo and the story may end sadly. Put it in a toyota corolla and it'll run forever.

So syn is for extended oci's, and extreme applications. Clear as mud?

 

[Gary Allan]

That's about it. There is no magic oil. Stuff that will last longer ..stuff that will endure more severe service (which also usually translates to longer). Sometimes you can disrupt established formations and clean up stuff, but if everyone did their homework, those will be minimal.

 

[Petrou]

Synthetic does last longer and keep things cleaner and produces less wear. But we were reading an article at the shop the other day where it showed that 3000/3 month oil changes produce more wear over longer OCI, like 5k or 7500 miles. Reason being, when you put the filter on and drain the oil. you have a dry start up till oil pressure is built, so the less dry starts the less wear. that was the moral of the article

 

[aquariuscsm]

Originally Posted By: Petrou
Synthetic does last longer and keep things cleaner and produces less wear. But we were reading an article at the shop the other day where it showed that 3000/3 month oil changes produce more wear over longer OCI, like 5k or 7500 miles. Reason being, when you put the filter on and drain the oil. you have a dry start up till oil pressure is built, so the less dry starts the less wear. that was the moral of the article


I`ve often wondered about that too. But wouldn`t that be the same as starting a car after the oil has all flowed back down into the oil pan (after the car has been shut down for awhile)?

 

[cafasco]

No not actually...that is the purpose of the anti-drain back valve or gasket (ABV)...it is supposed to hold the oil in the filter, which is why the filter is (supposed to be) full of oil when you remove it.

Premium filters typically have a silicon ABV that is supposed to last longer and work better than rubber ABVs.

 

[aquariuscsm]

Originally Posted By: cafasco
No not actually...that is the purpose of the anti-drain back valve or gasket (ABV)...it is supposed to hold the oil in the filter, which is why the filter is (supposed to be) full of oil when you remove it.

Premium filters typically have a silicon ABV that is supposed to last longer and work better than rubber ABVs.


What about those of us who are ocd about pre-filling the filter?

 

[Gary Allan]

Quote:
But we were reading an article at the shop the other day where it showed that 3000/3 month oil changes produce more wear over longer OCI, like 5k or 7500 miles.


Can you quote the source? The one that we're usually presented with was a Ford article promoting the "beyond 3000 mile" oil change interval.

Quote:
Reason being, when you put the filter on and drain the oil. you have a dry start up till oil pressure is built, so the less dry starts the less wear.


If it's the same article, that would not be the cause since Ford noted a spike in metals @ some point ..without even changing the oil at all. This was mirrored, iirc, in the Spacebears test. Somewhere around 2000 miles the metal spike. The implied subtext was "do more oil changes - get more excessive wear metals" ..which the actual origin was never determined. It could be residuals ..it could be some "seating" process where AW packages disrupted existing films ...who knows?

 

[bigmike]

Originally Posted By: aquariuscsm
Originally Posted By: cafasco
No not actually...that is the purpose of the anti-drain back valve or gasket (ABV)...it is supposed to hold the oil in the filter, which is why the filter is (supposed to be) full of oil when you remove it.

Premium filters typically have a silicon ABV that is supposed to last longer and work better than rubber ABVs.


What about those of us who are ocd about pre-filling the filter?


Yeah, what about us that presoak the filter 2.24 days before and sleep with it under our pillow. I bet they didn't think about us!