Do you have supporting documentation stating this?A magnetic drain plug is a suggested addition to the K-series Kohler engines. Most of the harmful metallic deposits in the engine oil are ferrous metals, generated from piston rings against the cylinder bore surface. A magnet will attract these particles and keep them out of suspension, thereby acting as a crude oil filter.
Not to start another oil controversy, but Kohler, as well as other small engine manufacturers approved the use of synthetic oils in all of their small engines. This includes the K-series. Recommended viscosity is 10W-30. Synthetics are much more suitable for hot-running air-cooled engines due to their stability and greatly reduced oxidation tendency.
Like experiences here.Arco Petroleum made a Graphite impregnated oil back in the 1980's, graphite is a great dry lubricant and Arco and I both thought it made a great motor oil additive, so I bought a case and ran it in my #72 for a couple years. When I rebuilt the engine it took me 2-3 hours to get all the black graphite off the bottom of the pan. That oil was only on the market a year or two.
I've been using Rotella 15W-40 oil in ALL my tractors, BIG and little, the Kawasaki engine manual for my Cub Cadet TANK recommends Rotella by name too, I use T-4 in the Tank and the 982, & 70, and Full synthetic T6 in the Hot-Rod K321 in the #72.
It's been quite a few years since I called Shell Oil's ANSWER MAN, they used to put the 1-800 phone numbers on the jugs & cans, I've asked and they have answered that the amount of ZDDP in Rotella varies by viscosity and grade, but most grades have 1200 to 1400 PPM, parts per million. More than plenty enough to protect the camshaft lobes and cam followers in any Kohler. Now if you had a BIG Block Chevy or a Hemi you wanted to Rev to 8000-9000 rpm a L-O-T, you might want to add a bit of supplemental ZDDP.
You can visit the Kohler engine website and view the oil viscosity recommendations on synthetics.Do you have supporting documentation stating this?
These engines exhibit loose tolerances that the thinner oil will leak and burn easier.
What oil should I use?
Recommendations vary for each engine type based on engine and operating temperature. Please consult your owner’s manual for oil recommendations.
Can I use synthetic oil?
Synthetic oils meeting the classifications listed in your owner's manual may be used; however, you should still perform oil changes at the recommended intervals.
Straight 30-weight oil is preferred. SAE IOW-30 oil is not recommended above 32F. Using this oil substantially increases oil consumption and combustion chamber deposits.
When switching from conventional oil to synthetic oil, fully drain the existing oil and remove the oil filter. Replace
filter and add KOHLER genuine oil. Your engine will immediately start seeing the performance improvement
KOHLER genuine oil is providing. It is possible there will be a small amount of residual oil in the system; however,
that is OK as they are compatible. By the second oil change, most residual oil from the past will be drained away.
In some occurrences there may be deposits that have built up over time in older or not well-maintained engines.
These deposits (sludge) can build up on the inside of the engine and otherwise plug failing gaskets and seals.
Over time, the KOHLER genuine oil will clean the engine and remove harmful deposits potentially exposing a
gasket or seal to leak. Those seals will need to be replaced.
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