[Healeys] Spin On Filter

[Michael Oritt]

Absent extraordinarily dirty conditions I doubt that the ability of any
filter, regardless of its length, to freely pass oil will be compromised
before mileage warrants a change.

If I have gone to the trouble of draining and changing oil it takes little
effort to also change the filter and since the most expensive filters cost
less than US$20.00 I think it borders on penny-pinching to not change the
filter given the costs of owning, storing, insuring and fueling of our
vehicles which are likely not our primary means of transport.

In any case if one is concerned about the internals of their oil filter (as
well as their engine) it would pay to buy an oil filter cutter and pull out
the medium for examination under sunlight.  This will tell more than simply
the appearance of the oil as detergent oil goes dark after only a short
amount of time whereas finding shiny bits of metal/bearing on the paper
surface--or not--will likely tell you something useful.

Best---Michael Oritt

On Fri, Apr 14, 2023 at 9:03 AM Kees Oudesluijs via Healeys <
healeys at autox.team.net> wrote:

> The external size of an oil filter is of little importance. It is the
> surface of the filtration medium that counts, and of course the size of the
> particles that can pass.
>
> Modern engines are made to much tighter tolerances and better materials,
> hence they wear very little, thus little debris and contamination. Service
> intervals can easily be as much as 10.000mls or way more. Engine life for
> normal everyday cars is usually beyond 200.000mls and over 500.000mls is
> not a rarity. Often the mechanicals last longer than the electronics.
>
> It is always difficult to decide when to change the oil filter. These days
> I usually change the oil every two years with an annual mileage these days
> of about 3000mls and change the oil filter every three oil changes. When
> changing oil I find it remarkable that the oil is still very clean rather
> than black. I now use K&N filters and 10W50  or20W50 oil for motorbikes as
> these have more additives than automotive oil due to various regulations:
> Bardahl, MPM, Penrite, Castrol Power RS etc.
>
> Kees Oudesluijs
>
>
> Op 14-4-2023 om 00:19 schreef llennep--- via Healeys:
>
> Curious Q.  I have wondered the same thing.  However, if you look at
> filters for modern cars size dos not seem to matter.  Many engines today
> call for a 3 in long filter not 4 to 5 inch.
>
>
> -----Original Message-----
> From: Michael MacLean <springer.mike51 at gmail.com>
> <springer.mike51 at gmail.com>
> To: Ahealey help <healeys at autox.team.net> <healeys at autox.team.net>
> Sent: Thu, Apr 13, 2023 10:59 am
> Subject: [Healeys] Spin On Filter
>
> Someone please explain to me why the filter required for my 1.8 ltr MGB
> engine (51515) is so much larger than the filter called for the spin on
> conversion for my BN2. (51516)  Just to add to the confusion, a
> cross-reference chart for either filter calls out the other filter as an
> alternative.  Does filter volume make any difference from either car?
> Mike MacLean
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