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<p>Thanks, ODB. And I apologize for not replying sooner.</p>
<p>Your points sound reasonable. And I also change oil more
frequently than recommended in the vehicles that I use regularly.
But the last few years, the TR6 is getting driven less than 1000
miles a year, hence my question. Though generally I try to drive
it for at least a half hour whenever I fire it up.</p>
<p>Based on the feedback from the list, I think I'm going to be the
wild man and go with a two year interval. :)<br>
</p>
<p>- GeneG<br>
</p>
<div class="moz-cite-prefix">On 8/29/22 20:02, old dirtbeard wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAG1pxgZ6c_JVT39OqZW1dBec_iNnrYW-0Vn6j0pN_+ySv4z+FA@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">I change oil at 5K miles or at 12 months and use
synthetic oil. Probably overkill for many of my engines,
however.
<div><br>
</div>
<div>Regarding oil setting in an unused engine, I believe that
synthetic oil setting in an unused engine probably would not
noticeably deteriorate for periods longer than 12 months. </div>
<div><br>
</div>
<div>I know many folks who put synthetic oil in air-cooled
motorcycles and only ride a few hundred miles a year. When
draining that oil, it looks pretty much the same as it did
when it was poured into the engine. I believe that it probably
could be used for longer than 12 months in that specific
scenario.
<div><br>
</div>
<div>I think the 12 month change interval for low mileage
engines is mostly important for engines that routinely see
short trips, do not reach operating temperatures,and may
have condensation build-up in the sump. It probably also is
more important for non-sealed crankcases in humid
environments where moisture from humidity could condense. </div>
<div><br>
</div>
<div>Moisture also is of course a byproduct of combustion, and
if the engine does not reach and run at normal operating
temperatures for sustained periods of time, moisture is
likely to remain in the crankcase and contaminate the oil. </div>
</div>
<div><br>
</div>
<div>I do not believe, however, that simply having oil in the
sealed sump of an unused engine would need to be changed every
12 months from being in contact with the metal or other
materials inside the engine.</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Aug 29, 2022 at 6:56
PM Tom Coradeschi <<a href="mailto:tjcora@icloud.com"
moz-do-not-send="true" class="moz-txt-link-freetext">tjcora@icloud.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div dir="auto">The contaminants will cause the oil to
degrade, hence the need to change it on either time or
mileage, per the OEM spec (whichever comes first).<br>
<br>
<div dir="ltr">Tom Coradeschi
<div><a href="mailto:Tjcora@icloud.com" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">Tjcora@icloud.com</a></div>
</div>
<div dir="ltr"><br>
<blockquote type="cite">On Aug 29, 2022, at 1:44 PM, Gene
Garrison <<a href="mailto:gene@garrison-grafixx.com"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">gene@garrison-grafixx.com</a>>
wrote:<br>
<br>
</blockquote>
</div>
<blockquote type="cite">
<div dir="ltr">
<p>I'm glad you brought that up. I've always wondered
about changing oil.</p>
<p>So oil sitting in bottles on the shelf doesn't "go
bad". Right?</p>
<p>Then why does oil sitting in a rarely used engine
need to be changed? I know it now has contaminants
and such in it, but those aren't going to cause it to
degrade, are they?</p>
<p>- GeneG<br>
</p>
<div>On 8/29/22 03:59, Jeff Scarbrough wrote:<br>
</div>
<blockquote type="cite">
<div dir="auto">I just replaced a set of trailer tires
that had less than 2500 miles on them because they
were ten years old and definitely showing it.
<div dir="auto"><br>
</div>
<div dir="auto">I consider tires to be like oil -
they should be changed at a mileage or time
interval, whichever comes first. It's just
something you have to budget for.</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Aug 29,
2022, 02:04 Bob Spidell <<a
href="mailto:bspidell@comcast.net"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">bspidell@comcast.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px
0px 0px 0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div> re: "How many years can a set of tires go
..."<br>
<br>
Subject to debate, and how the tires are
maintained. Some--often people who make and sell
tires--insist six years is the limit, regardless
of mileage, and if the tires are constantly
exposed to extreme weather and mileage that's
not unreasonable. OTOH, if the tires are kept in
a garage not subject to temperature extremes and
are only used 'around town' you can usually go
more, 7 or 8 years wouldn't be too risky. At any
rate, going beyond 10 years is pushing your
luck.<br>
<br>
BUT ... for an SUV I'd be more cautious and
probably observe the 6-year 'rule.' SUVs and
other trucks are top heavy and a catastrophic
failure--i.e. a blowout--esp. on a front tire
can cause the vehicle to roll over. Ford just
got slapped with a $1B+ liability charge for an
old truck that had a blowout, rolled, and the
cab squashed the elderly occupants. A couple
decades ago Ford got slammed when some
incorrect, improperly inflated Firestone
tires--Ford and Firestone go WAY back--caused
some fatal rollover accidents with some
Explorers.<br>
<br>
My rule of thumb: If I find myself worrying
about my tires, it's time for new. Your tires
are only three years (+/-) old and, unless
they're showing 'checking'--cracking--or other
damage they should be good for at least a couple
more years. Check your tire pressures regularly
(at least once a month).<br>
<br>
<br>
<br>
<div>On 8/28/2022 9:19 PM, Shannah Miller wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div>Thank you, Ian, for commenting to the
group. I will</div>
<div>need tires at some point, and that's
good to know.</div>
<div><br>
</div>
<div>That said, my car is the spare car of
the family, and</div>
<div>has had the same tires since 2019. How
many years</div>
<div>can a set of tires go if they are just
mostly used to</div>
<div>putt around town? (My car has not
quite 10,000 miles</div>
<div>on it.)<br>
</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Shannah<br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun,
Aug 28, 2022 at 7:20 PM Ian McFetridge
<<a
href="mailto:shop-talk2@mcfetridge.org"
rel="noreferrer" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">shop-talk2@mcfetridge.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div dir="auto">I have had the Michelin
Defender LTX on my pickup since fall
2020 and they are wearing well, ride
smooth and quiet. I’ve used Michelins
on trucks since I worked in the tire
dept at Sam’s in college. They always
took the least amount of weights to
balance and had the least returns for
issues or to rebalance. The manager at
Costco said that is all still true when
I bought the last set. YMMV :)</div>
<div dir="auto"><br>
</div>
<div dir="auto">Best </div>
<div dir="auto">Ian</div>
<div><br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On
Sun, Aug 28, 2022 at 8:03 PM john
niolon <<a
href="mailto:jniolon@att.net"
rel="noreferrer" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">jniolon@att.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div>
<div><font face="Segoe UI">shop
content... I drive my suburban
into my shop</font></div>
<div> </div>
<div><font face="Segoe UI">time
for tires... always used
Michelin for the last 20 years
with good service... Vehicle
is 2008 Suburban 1500 with 95%
highway or town ...no off road</font></div>
<div><font face="Segoe UI">occasional
towing my hobby truck to shows
on 20' car hauler (once or
twice a year with load
equalizing hitch...) Looking
at reviews on my first choice
Michelin Defender LTX/MS</font></div>
<div><font face="Segoe UI">275/55-20.
The reviews talk a lot about
road noise and rough ride.....
My current Michelin Defenders
(bought in Jan 2016 ride
smooth and wear well.. 76K
miles on them so far)</font></div>
<div> </div>
<div><font face="Segoe UI">I just
turned 75 and this might be my
last set of tires <img
alt="Grinning Face with
Smiling Eyes" style="width:
24px; max-width: 100%;
background-color: rgba(0, 0,
0, 0); border-color:
rgb(255, 255, 255); color:
rgb(255, 255, 255);"
moz-do-not-send="true"
align="absMiddle"> … so I'm
looking for your thoughts on
Michelin or others afa
mileage, ride, noise etc.</font></div>
<div> </div>
<div><font face="Segoe UI">thanks</font></div>
<div><font face="Segoe UI">john</font></div>
</div>
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