656 gas engine oil

Been looking around for engine oil for this tractor. There are no IH dealers close, but I can get Cenex oil and have used that in all my equipment for years. In a 30 wt oil I can get either %.05 ash oil or %0 ash oil. Which would you all figure would be best, or does it have to be IH low ash?? Thanks

Does not have to be IH as long as it is low ash. I don't remember the percentages...I run Rotella 15w-40 diesel oil in all my tractors. Diesel oils have lower ash contents.

The following is an Email from Shell Oil to Me, followed by my original question to them.

Dear Sir,

The information we have for the Farmall 706 (gasoline) indicates it
called for an API SF low ash oil (max 0.5% ) for viscosity ranges of
10w, 30w, and 5w-30. No information on higher viscosity ranges is
listed in our reference. Rotella T 15w-40 meets API SM
specifications for gasoline engines, which covers API SF, but has a
maximum ash content of 1%.

Best Regards,

Shell Technical

#

On Wed, 10 Apr 2013 01:09:33 +0000 you wrote:

>I participate in a forum at Yesterdays Tractors. IH “Farmall” has
specified
>Low ash oil for use in its gasoline engines from the early 1960s.
We are in a
>discussion as to whether the current Low ash diesel grade oils are
of the same
>intended (or unintended) ash levels. My family has been a
consistent user of
>Rotella Oils, and would like to be assured that if we used 15- 40
Rotella
>diesel oil in a 706 Farmall gasoline tractor, that it would meet the
same low
>ash intentions as the IH branded oil from the dealer.
>Dr. James A Nicholson, Technology Department St. Cloud State
University,
>[email protected]
>
>James A. Nicholson, Ph.D.

Thank you both for the replies!!