Filter change intervals

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Originally Posted By: BlueOvalFitter
Originally Posted By: surfstar
Originally Posted By: oilotaku
always done it every change and as cheap as they are why not?


Because, as many members are finding out, its not necessary. So the question becomes, why do it every time?

This reminds me of the current changes the US is suddenly going through, esp. the last 5 years. Change is good, except in these 2 instances.


hindsight is 20/20


2x OCIs for filters?

yes

we

fram
 
Originally Posted By: surfstar
Originally Posted By: BlueOvalFitter
Originally Posted By: surfstar
Originally Posted By: oilotaku
always done it every change and as cheap as they are why not?


Because, as many members are finding out, its not necessary. So the question becomes, why do it every time?

This reminds me of the current changes the US is suddenly going through, esp. the last 5 years. Change is good, except in these 2 instances.


hindsight is 20/20


2x OCIs for filters?

yes

we

fram

My vision is 20/15.
 
I leave the filter on our Windstar for two or three OCI's; but it has leaky intake gaskets so the oil gets dumped every 2,500 miles in normal driving. (The longer we have kept it, the more I regret not changing them when we bought it. Rust says it's not worth it now).

The Bonneville though, will get changed every time (witch is looking somewhere around 8-9k).

I run cheapie Quaker State filters. A higher quality filter I might feel more comfortable running to 16-18k.
 
I try and oversize if possible, then change the filter every second OCI. If oversize isn't available, I'll stick to the factory recommendation.

Every 2nd OCI especially advantageous in some engines for the DIYer where the filter is on the side of a block and makes a mess upon removal. I also do it for the increases in filtering efficiency as an oil filter goes for longer.
 
Originally Posted By: Leo
I try and oversize if possible, then change the filter every second OCI. If oversize isn't available, I'll stick to the factory recommendation.

Every 2nd OCI especially advantageous in some engines for the DIYer where the filter is on the side of a block and makes a mess upon removal. I also do it for the increases in filtering efficiency as an oil filter goes for longer.

 
IMHO - if you extend your OCI long enough, you will only need to use the filter once as it will used up and should be replaced.
 
Originally Posted By: 2010_FX4
IMHO - if you extend your OCI long enough, you will only need to use the filter once as it will used up and should be replaced.

2010_FX4, what OCI do you think I should run the Havoline in my engine to?
 
So we need to have 2 UOAs done. First one is new oil, new filter. Second is new oil, and the original filter. See if there is a noticeable difference.

Who'll volunteer? BOF?
 
Originally Posted By: JZiggy
So we need to have 2 UOAs done. First one is new oil, new filter. Second is new oil, and the original filter. See if there is a noticeable difference.

Who'll volunteer? BOF?

NEVER!
 
Methinks right about now:

For a Bosch Distance Plus or a Mobil Extended Performance I would go 15,000 miles.
For a Fram Ultra 12,000 miles to 15,000 in a pinch.
For a Fram OCOD 5000 miles, 7500 in a pinch.
A Microguard. same as the Fram OCOD.
A Fran Tough Guard 7500 miles.
My present Bosch Premium will go 10,000 miles.
Any E-Core 5000 miles max.
Wix and Napas 10,000 miles.
Toyota original equipment 7500 miles.
 
Since there is currently no way to know when your oil filter goes into bypass, it should be changed at each oil change unless recommended otherwise by the manufacturer.

You can make any argument you want to about filter capacity, modern engines not shedding much metal, ability of oil to keep particles in suspension, etc etc etc. But you canNOT say when the oil filter will go into bypass and allow those particles to be pumped into your engine.

That said, in an ideal world you could leave your oil filter on until just before it goes into bypass, in order to get the maximum efficiency at minimum cost.
 
Last edited:
Originally Posted By: LeakySeals
If its an Asian OE leave it on forever, the pickup screen will clog before the filter does.


crackmeup2.gif
 
Originally Posted By: KCJeep
Originally Posted By: LeakySeals
If its an Asian OE leave it on forever, the pickup screen will clog before the filter does.


crackmeup2.gif


AKA, Honda?
 
I don't think we can just assume bypass automatically lets particles into the engine though. Yes, oil will bypass the media. But there will still be pressure against and flow through the media even during a bypass situation. I'm betting all the junk trapped on and in the media will stay there.

And from my observations cutting many filter's open.. the majority of what you're going to see trapped by the filter isn't metal particles. It's broken down sludgy pieces of oil. Not that you'd want these floating around your engine - but I think the thought that these are trapping pieces of worn engine might be a little off base.. percentage wise, at least.
 
Originally Posted By: KCJeep
Just about any filter will structurally handle longer intervals without issue IMO, unless your engine is filthy. But leaving the filter on is essentially the same as topping of your new oil change with dirty, depleted oil. I no longer leave filters on for this reason.


^ This ^

who the helll wants a quart of dirty nasty oil to go with their 4 quarts of new clean oil?

wake up, people!
 
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