On Fri, 26 Mar 2021 14:47:31 -0500, Jim Joyce
wrote:

On Fri, 26 Mar 2021 18:49:56 +0530, mike wrote:

On 26-03-2021 02:25 AMuzi wrote:

It's vestigial from the 1950s when oil and labor were cheap
and filters were expensive. No good reason now, certainly
not any technical reason. I changed to oil with new filter
every 3K miles in the 1970s.

I already explained in great detail that it's not at all about money.
It's about design and function.

Most people want a simple answer to everything which money is to them.
But not everything is a simple dollars to dollars decision like you claimed.

If all you care about is money then knowing that both the oil filter and the
oil are cheap you're welcome to throw away both at the same interval which
is why I said it's up to you.

But stop saying it's about money when that's only how YOU think.
The manufacturers think differently than you think.

For them it's about engineering.

Many manufacturers recommend oil filter intervals different than oil.
https://knowhow.napaonline.com/how-m...l-filter-last/

If you disagree with the manufacturer then you should answer this question:
Does the oil filter always fail at the exact same rate as does the oil?

Remember the old oil filter trick where you just use a roll of toilet
paper? I thought I'd never see that again but it turned up on an episode of
Garage Squad.
That works OK for a "bypass" filter - and the day a filter "fails" on
a car is a day too late to change it. Same with oil.