[AT] Diesel rated oi/ Gasoline powered engine?

Tue May 28 07:33:17 PDT 2019

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.
Cecil

On 5/28/2019 8:39 AM, Stephen Offiler wrote:
> Interesting article:
>
> https://www.machinerylubrication.com/Read/28576/comparing-gasoline-diesel-engine-oils-
>
> 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.
>
> 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.
>
> 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.
>
> SO
>
>
> On Mon, May 27, 2019 at 8:38 AM Mark Johnson 
> <markjohnson100 at centurylink.net 
> <mailto:markjohnson100 at centurylink.net>> wrote:
>
>     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.
>
>     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.
>
>     Disclaimer: My dad's baby sister was married to a Shell jobber,
>     but we paid the same price as everybody else :-).
>
>     Mark J
>     Columbia, MO
>     Southern Indiana farm boy now working at the big university :-)
>
>     On 5/26/2019 12:04 PM, David Steinich wrote:
>>     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
>>     <mailto: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
>>         <mailto: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
>>         <mailto: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 <mailto: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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