On 3/25/2021 7:16 PM, mike wrote:
On 25-03-2021 22:01 Jim Joyce wrote:

(My personal opinion is twice a year for dino & once a year for synth).
(My personal opinion is a filter change roughly about once a year.)

I'm curious. If you're going to go to the trouble of changing the oil
twice
a year, why not change the filter twice a year, as in, doing both at the
same time? It seems like only a small increment of extra work and
expense.

That's a good question where the answer is that it's totally up to you.

The logic is no different than the logic you use for when to replace your
brake rotors or when you replace your tire valves or when you replace your
transmission filter or when you replace your tie rod ends (and on and on).

When to replace is up to you.

Why not replace the rotors or drums with every change of pads or shoes?
The logic is the rotors/drums last longer than one change of pads/shoes.

Why not replace the tire valves with every rotation or change of tires?
The logic is the tire valves can easily last longer than one set of wheels.

But it's totally up to you.

The logic is that the oil filter lasts longer than does one change of oil
just as brake rotors often last longer than one change of brake pads.

If you want to change them every time that's completely up to you to
replace
them even though they're still well within spec when you changed them.

It's totally up to you.

Of course it is up to you. I can see condition and measure wear on
rotors when changing pads so it is an easy decision.

Can you see and measure how well the filter is working? Given it is an
integral part of the lubrication system, has a cost of $10, and is
helping protect a $5000+ engine, I change it every time. Cheap
insurance and peace of mind.