[AT] Diesel rated oi/ Gasoline powered engine?

[Carl Gogol]

Henry-
Unfortunately, the oil I used is not rated S anything.  How does that change
your answer?
Carl

-----Original Message-----
From: AT <at-bounces at lists.antique-tractor.com> On Behalf Of Henry Miller
Sent: Sunday, May 26, 2019 9:52 AM
To: at at lists.antique-tractor.com
Subject: Re: [AT] Diesel rated oi/ Gasoline powered engine?

Read closely, most diesel rated oils are rated up to sf or something like
that. The s stands for spark ignition, and the f is the revision. If it has
a s rating at all it is better for your engine than a more modern sj rating.
Because of emissions Car engine manufacturers have been unable to get the
older additives needed by your tractor to work and have had to change their
bearings to get an oil that lubricates without destroying emissions. Diesel
engines have different considerations and still have those additives. 

Bottom line, in all antique gas engines I start in the diesel oil section
and then find one with a gas rating. 

--
  Henry Miller
  hank at millerfarm.com

On Sun, May 26, 2019, at 8:39 AM, Carl Gogol wrote:
> Without thinking, I just drained my "new" 1968 IH-140 and filled it 
> with Rotella 15W-40 T4 Diesel rated oil.
> It is one of those "All Fleet" oils and I  was easily led astray by 
> that slogan.  Of course I carefully read the label once the jug was empty.
> What would you do?  Drain and replace or leave it in and replace it 
> next year?  Are the additives all that different?
> The IH 140 is an old state road clipper with a side mount "HydroClipper"
> sickle bar mower.  The engine sounds really tight and absent of any 
> sounds common from a long used engine.  It will probably get less than 
> 20 hours use in a year.
> Carl in rainy Mallkus NY
> 
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