[AT] Synthetic Oil

[Cecil Bearden]

I changed a couple of my tractors to 5w-30 2 years ago when we needed 
them for feeding in cold weather.  I forgot to change the oil back to 
15w-40 in the summer and did not seem to have any problems and no oil 
consumption, so I still have 5w-30 in them.  I also changed my honda 
powered compressor to the 5w-30 so I could crank it in the winter.

I used to use Mystic oil exclusively either 30w or 15w-50. During a hot 
spell when cutting hay with the disc mower, I had 5w-30 in the old 
Belarus 825 and 15W50 in the 8345.  Both tractors are the same except 
for sheet metal and 7 years difference.  The oil pressure stayed up as 
the heat gauge went to 220 on the old tractor with 5w-30, and the newer 
tractor lost pressure at 210 deg with the 15W-50.  I should note  that 
the 5w-30 was a local farm store brand, and the 15w-50 was Mystic.   I 
have since switched to the local brand and have had no problems, and 
have saved enough that I can change oil very frequently.

I have thought about oil analysis, but never got further than taking the 
sample.

Cecil in OKla


On 11/12/2016 8:04 PM, Henry Miller wrote:
> I'd use the same synthetic 10w30 in summer and 5w30 in winter in them
> all. If you notice an engine gets low on oil before the regular change
> comes up I'd change, but otherwise small engines generally don't need
> much from an oil so they are all good. I would gues the only reason they
> all spec different oils is they used the latest oil spec that was
> available when they made the engine.
>