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<p>I have several 5.4 Ford v-8 engines from the mid 90's to 2003.
They specify 5W-30 oil. When I use that weight they rattle at
startup. Wen I use 1 5W-40, they don't rattle and actually run a
few degrees cooler in the summer.<br>
Cecil</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 5/28/2019 8:39 AM, Stephen Offiler
wrote:<br>
</div>
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cite="mid:CAP6upcgk8Nt1Hi4OsBXQ9hRcfW7c=k=PQA_Gxo8MOVndMK-+Cw@mail.gmail.com">
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<div dir="ltr">
<div dir="ltr">Interesting article:</div>
<div dir="ltr"><br>
<div><a
href="https://www.machinerylubrication.com/Read/28576/comparing-gasoline-diesel-engine-oils-"
moz-do-not-send="true">https://www.machinerylubrication.com/Read/28576/comparing-gasoline-diesel-engine-oils-</a><br>
</div>
<div><br>
</div>
<div>So diesel oils still contain ZDDP, which was reduced or
removed from spark-ignition oils after around SF or SG (I
think) due to catalytic converter poisoning. ZDDP is
desirable to have in an oil, absent the concern over the
catalytic converter. </div>
<div><br>
</div>
<div>The choices in diesel oils tend to be higher in
viscosity; we can all see that on the shelves at the store.
This can be bad news in a modern, fresh,
tight-bearing-clearance engine. Thinner oils are necessary
to properly fill the smaller bearing clearances. On the
contrary, it seems that the looser old iron we should be
discussing here would benefit from the thicker viscosity in
most cases. Up to the point where there is concern about
pumpability when very cold.</div>
<div><br>
</div>
<div>That last concern, where diesel oils have higher
detergent, doing an excessively good job on the cylinder
walls - I'm struggling to understand why this is a factor
for gas engines and not a factor for diesel engines.</div>
<div><br>
</div>
<div>SO</div>
<div> </div>
<div><br>
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<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, May 27, 2019 at 8:38
AM Mark Johnson <<a
href="mailto:markjohnson100@centurylink.net"
moz-do-not-send="true">markjohnson100@centurylink.net</a>>
wrote:<br>
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0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p>I don't know how much the formula might have changed, but
from the early 1970's through when my dad left the farm in
the mid 2000's, we ran Rotella T 15W-40 in a JD 620, 2
730's, an IH 300, AC 190XT, 210, and 8030, several pickup
trucks and Gleaner combines, and heaven-only-knows how
many cars, including mine (Chevy 350 V8). Never had a
lubrication-related failure that I can remember. We bought
the stuff by the barrel; usually had two of them around -
one at each farm, 14 miles apart. The only reason I no
longer use it is that today's cars recommend 5W-20 or
5W-30 viscosity.<br>
</p>
<p>The only exceptions were the JD H and A, where we used
"Golden Shell" non-detergent SAE 20 or 30, depending on
time of year.</p>
<p>Disclaimer: My dad's baby sister was married to a Shell
jobber, but we paid the same price as everybody else :-).</p>
Mark J<br>
Columbia, MO<br>
Southern Indiana farm boy now working at the big university
:-)<br>
<div class="gmail-m_-2987080698562284059moz-cite-prefix"><br>
</div>
<div class="gmail-m_-2987080698562284059moz-cite-prefix">On
5/26/2019 12:04 PM, David Steinich wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">I've started using the Rotella T-4 15W-40
in all my tractors that I don't expect to work in the
winter. Haven't been doing it long enough to see if
there are any damaging effects though. I have read about
the additives like Henry mentioned - specifically zinc
and how it is bad for catalytic converters, but good for
our old valve lifters.
<div>It's also a lot easier to just have two oils on the
shelf.</div>
<div><br>
</div>
<div>Dave </div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun, May 26, 2019
at 11:50 AM Carl Gogol <<a
href="mailto:cgogol1971@gmail.com" target="_blank"
moz-do-not-send="true">cgogol1971@gmail.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">Henry-<br>
Unfortunately, the oil I used is not rated S
anything. How does that change<br>
your answer?<br>
Carl<br>
<br>
-----Original Message-----<br>
From: AT <<a
href="mailto:at-bounces@lists.antique-tractor.com"
target="_blank" moz-do-not-send="true">at-bounces@lists.antique-tractor.com</a>>
On Behalf Of Henry Miller<br>
Sent: Sunday, May 26, 2019 9:52 AM<br>
To: <a href="mailto:at@lists.antique-tractor.com"
target="_blank" moz-do-not-send="true">at@lists.antique-tractor.com</a><br>
Subject: Re: [AT] Diesel rated oi/ Gasoline powered
engine?<br>
<br>
Read closely, most diesel rated oils are rated up to
sf or something like<br>
that. The s stands for spark ignition, and the f is
the revision. If it has<br>
a s rating at all it is better for your engine than a
more modern sj rating.<br>
Because of emissions Car engine manufacturers have
been unable to get the<br>
older additives needed by your tractor to work and
have had to change their<br>
bearings to get an oil that lubricates without
destroying emissions. Diesel<br>
engines have different considerations and still have
those additives. <br>
<br>
Bottom line, in all antique gas engines I start in the
diesel oil section<br>
and then find one with a gas rating. <br>
<br>
--<br>
Henry Miller<br>
<a href="mailto:hank@millerfarm.com"
target="_blank" moz-do-not-send="true">hank@millerfarm.com</a><br>
<br>
On Sun, May 26, 2019, at 8:39 AM, Carl Gogol wrote:<br>
> Without thinking, I just drained my "new" 1968
IH-140 and filled it <br>
> with Rotella 15W-40 T4 Diesel rated oil.<br>
> It is one of those "All Fleet" oils and I was
easily led astray by <br>
> that slogan. Of course I carefully read the
label once the jug was empty.<br>
> What would you do? Drain and replace or leave it
in and replace it <br>
> next year? Are the additives all that different?<br>
> The IH 140 is an old state road clipper with a
side mount "HydroClipper"<br>
> sickle bar mower. The engine sounds really tight
and absent of any <br>
> sounds common from a long used engine. It will
probably get less than <br>
> 20 hours use in a year.<br>
> Carl in rainy Mallkus NY<br>
> <br>
> _______________________________________________<br>
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