Originally Posted By: flatlandtacoma
Originally Posted By: ZeeOSix
Originally Posted By: flatlandtacoma
If you had reason to believe a filter may be loaded up after 1 OCI, then change it without question. Like I say, I have cut them open and from
my vehicles there is nothing there. So I would have no problem
following the engine manufacturer's recommendation and leaving it on for 2 OCIs.
You (and anyone else in this free country) can do whatever you want ... leave them on for 5 or 10 oil changes if they look clean every time.
I always change the filter with the oil ... what's $5 for peace of mind. Besides, on a GM vehicle with the filter bypass built into the block, and set to 8 psi there is not as much headroom for filter loading. LS6 has high oil volume, and even with a brand new filter with 200 deg F oil there's around 5 psid at max pump flow ... that only gives a measly 3 psi of headroom for filter loading over the OCI ... not worth the risk for me to leave it on twice or more.
People can do whatever they want ... whatever makes 'em happy. I really don't care.
I don't care what you do either. But if you are measuring 5 psid across your filter steady state you are doing something wrong or your bearings are shot.
You're not following. My car puts out ALOT of oil volume ... so at full pump pressure there is enough oil flow to create 5 psid across a brand new filter. So ... with the built in 8 psi bypass setting in the engine's block, it only gives a measly 3 psi of "safety margin" for filter loading over the OCI ... and I routinely rev the heck out of this car, so the oil pump will be puttin' out major volume. If there is enough media loading to cause an extra 3 psid at full oil volume flow, then the filter is in danger of going into bypass mode. Get what I'm sayin' here?
Originally Posted By: flatlandtacoma
And if you don't like a manufacturer's recommendation fine, but don't make it sound like I recommended using a filter for more than 2 oil changes.
But you do recommend it if the manufacture recommends it. You said it above in one of your posts.
Every car has it's own characteristics. Most people probably wouldn't realize that some hi-pro GM cars have such a small margin on bumping into the bypass valve compared to other cars with the same pump volume because of the relatively low pressure setting on built-in block bypass valve. It's up to the owner to understand it and make the correct decision in terms of oil & filter use.