[AT] Diesel rated oi/ Gasoline powered engine?

[David Steinich]

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.
It's also a lot easier to just have two oils on the shelf.

Dave

On Sun, May 26, 2019 at 11:50 AM Carl Gogol <cgogol1971 at gmail.com> wrote:

> 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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