Didn't have any 10W30 for the Kohler, so...

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296
Location
Midwest
I put one qt. of 5W30 and one qt. of 15W40 in. Yes, they were different brands, too laugh. Kohler 18HP on my 2005 Simplicity lawn tractor. Finished it off with a WIX 51348 filter. Comments on the mix?
 
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Messages
3,858
Location
Cape Cod, MA
Your engine will seize before you finish cutting the grass. Seriously, considering that most people either never change the oil (just do top-ups) or use off-brand or possibly unsuitable oils, I think your engine will last a good long time on your mix.
 
Messages
772
Location
Ohio
Should be fine. I like to run 0W30 Castrol with the same filter in my Kohler. Most of the small engine oils sold by Kohler etc. are SJ. And I believe they are non-resource conserving as well. My translation (which could be wrong)- the preferred oils for these air cooled engines are not low HTHS and contain higher percentages of certain anti-wear additives than are allowed in most of the xW30 oils currently marketed in the US.
 

stevejones

Thread starter
Messages
296
Location
Midwest
Well, it made it through one mow so far - still running! The 5W30 was Chevron & 15W40 was Delo...I'll change it again this time next year....maybe. I keep hoping the Simplicity will blow up so I can get a Deere!...lol...
 
Messages
628
Location
DuQuoin, Illinois
Originally Posted By: stevejones
Well, it made it through one mow so far - still running! I keep hoping the Simplicity will blow up so I can get a Deere!...lol...
That can be arranged. Where do you live?
 
Messages
1,250
Location
Tennessee
I have run Rotella 15w-40 in my Kohler for this whole grass cutting season. It seems ok, just starting to get dark colored. I run the over sized filter. I dont think the Kohler cares a whole lot.
 
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