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kohker oil recomendation #5162637 07/16/19 01:44 PM
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1978elcamino Offline OP
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Time to change the oil in my Huslter 60" ztr. It has a Kohler 7000 series 26hp. After one mow for break in I changed the FF to RK conventional 10w30 twice. Now it should be well broken in and any assembly trash flushed out. Time for a long term oil. Please note Im in florida where its hot year round and I mow pretty much year round as well. I have a surplus of t5 10w30 and t4 15w40. Which one would be better? Or should I be using ST SAE30 or SAE40?


2018 F150 5.0
2016 Ford Fusion 2.5
Re: kohker oil recomendation [Re: 1978elcamino] #5162708 07/16/19 03:03 PM
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bchannell Offline
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If it were me, I'd use the 15w40 and then the 10w30, you'll be fine.

Re: kohker oil recomendation [Re: bchannell] #5162753 07/16/19 03:52 PM
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j_mac Offline
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Everyone correct me if this is wrong... I was just at my local Tractor Supply asking what small engine oil they keep and their guy who seemed like he knew a bit recommended Kohler 10w-30 for my generator. He said Kohler puts a "tracer" in their oil and if you don't use their oil they can deny a warranty claim. He also said "all the manufacturers put tracers in their oil for this purpose." I'm calling bullocks. But I thought it might be relevant to this discussion.

Re: kohker oil recomendation [Re: 1978elcamino] #5162758 07/16/19 03:59 PM
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Kjmack Offline
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He is full of it . I bought a generac 17,500 kw a year ago . It was not cheap and not one page of the manual said I had to use a certain brand oil . Just gave viscosities to use in certain temperatures.

Re: kohker oil recomendation [Re: 1978elcamino] #5162773 07/16/19 04:16 PM
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doitmyself Offline
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The Magneson Moss Warranty Act prohibits tie-in warranty sales:

" Section 102(c) prohibits tying arrangements that condition coverage under a written warranty on the consumer's use of an article or service identified by brand, trade, or corporate name unless that article or service is provided without charge to the consumer."
https://www.govinfo.gov/content/pkg/CFR-2006-title16-vol1/xml/CFR-2006-title16-vol1-sec700-10.xml

"In other words, a manufacturer cannot “tie” the effectiveness of the warranty it provides for the product to the use of specified replacement parts or authorized service providers." ..(unless the parts are provided free or the company has an FTC waiver).
https://www.taftlaw.com/news-events...unauthorized-part-will-void-the-warranty

Copy my first link and go back into the store and ask for your free oil.

Re: kohker oil recomendation [Re: 1978elcamino] #5162797 07/16/19 04:54 PM
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nascarnation Offline
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I'd be interested to know what the commercial guys run in their ZTRs.
In FL, the 15W40 sounds like a good plan. Or any of these low price syns now going for 20 bucks (or less) for 5 quarts.

I ran 0W30 Castrol in my OPEs for a decade but it's overkill.

Re: kohker oil recomendation [Re: j_mac] #5162826 07/16/19 05:48 PM
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Kruse Offline
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Originally Posted by j_mac
Everyone correct me if this is wrong... I was just at my local Tractor Supply asking what small engine oil they keep and their guy who seemed like he knew a bit recommended Kohler 10w-30 for my generator. He said Kohler puts a "tracer" in their oil and if you don't use their oil they can deny a warranty claim. He also said "all the manufacturers put tracers in their oil for this purpose." I'm calling bullocks. But I thought it might be relevant to this discussion.


This post reminds me of when my mom bought a new riding lawn mower about 10 years ago. The salesman was ADAMANT that only non-detergent 30 weight be used in her new mower. He insisted on it. He even sold her a few quarts of it with the purchase of the new mower. He had her so convinced that she absolutely did not believe me when I told her that detergent oil was the oil to use. So....I opened up the operator's manual and showed her exactly what the factory said to use in it, exactly what the salesman said not to use. Had the mower experienced engine failure during the warranty period and the factory found out that non-detergent oil was in the engine, the warranty could be refused.
Why are these idiots allowed to sell lawn mowers anyway?

Re: kohker oil recomendation [Re: nascarnation] #5162837 07/16/19 06:07 PM
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Lawn_Care Offline
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Originally Posted by nascarnation
I'd be interested to know what the commercial guys run in their ZTRs.


Around here, most of us use 15w40, or a 10w40 if bought from a dealer.
Either way, a 40-wt is quite common even in Missouri during mowing season.

Last edited by Lawn_Care; 07/16/19 06:10 PM.

True victory does not come from defeating an enemy. True victory comes from giving love and changing an enemies heart.
Re: kohker oil recomendation [Re: 1978elcamino] #5162856 07/16/19 06:30 PM
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Vern_in_IL Offline
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Air cooled motor? Obivious a full Synthetic with a "HM" formula with a strong add pack, older formula Mobil1 is what I use, now it's reformulated with less goodies, I would go Valvoline.

Re: kohker oil recomendation [Re: 1978elcamino] #5162872 07/16/19 06:49 PM
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Linctex Offline
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in Florida?

15W-40 all year round.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: kohker oil recomendation [Re: Kruse] #5162874 07/16/19 06:51 PM
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Linctex Offline
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Originally Posted by Kruse
and showed her exactly what the factory said to use in it, exactly what the salesman said not to use. Had the mower experienced engine failure during the warranty period and the factory found out that non-detergent oil was in the engine, the warranty could be refused.
Why are these idiots allowed to sell lawn mowers anyway?


It probably would've been fine.

I have rebuilt MANY car engines that used non detergent 30W for break in oil.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: kohker oil recomendation [Re: Lawn_Care] #5162896 07/16/19 07:02 PM
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doitmyself Offline
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Originally Posted by Lawn_Care
Originally Posted by nascarnation
I'd be interested to know what the commercial guys run in their ZTRs.


Around here, most of us use 15w40, or a 10w40 if bought from a dealer. Either way, a 40-wt is quite common even in Missouri during mowing season.

Ten or more years ago, Kohler preached that only 10w30 could be used in the Command series engine due to the hydraulic lifters. Has this idea been debunked?

Re: kohker oil recomendation [Re: doitmyself] #5162905 07/16/19 07:12 PM
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Originally Posted by doitmyself
Ten or more years ago, Kohler preached that only 10w30 could be used in the Command series engine due to the hydraulic lifters. Has this idea been debunked?


That's a great question. I have a couple of friends that have run Kohler engines for years, I'll inquire.
All of mine so far have been Kawasaki engines, and one Briggs commercial.
Kawasakis and 40-wts seem to go together like peas and carrots.

Last edited by Lawn_Care; 07/16/19 07:14 PM.

True victory does not come from defeating an enemy. True victory comes from giving love and changing an enemies heart.
Re: kohker oil recomendation [Re: Linctex] #5163139 07/17/19 05:47 AM
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Kruse Offline
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Originally Posted by Linctex
Originally Posted by Kruse
and showed her exactly what the factory said to use in it, exactly what the salesman said not to use. Had the mower experienced engine failure during the warranty period and the factory found out that non-detergent oil was in the engine, the warranty could be refused.
Why are these idiots allowed to sell lawn mowers anyway?


It probably would've been fine.
I have rebuilt MANY car engines that used non detergent 30W for break in oil.


So your full time job is being a lawn mower salesman? banana

Re: kohker oil recomendation [Re: doitmyself] #5163149 07/17/19 05:58 AM
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bubbatime Offline
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Originally Posted by doitmyself

Ten or more years ago, Kohler preached that only 10w30 could be used in the Command series engine due to the hydraulic lifters. Has this idea been debunked?


The Kohler command is fully pressure lubed engine with an oil pump, oil pressure, and hydraulic lifters. These lifters in these engines work best with 10W30 and the lifter tapets will have a hard time refilling with oil if thicker oil is used. Very common problem in these engines to make a lot of noise/racket if the lifters can’t pump back up.

The op doesn’t have a command engine I don’t think, in which case he should use 15W40 or SAE40 year round in Florida.


2019 Honda CRV 1.5T dealer bulk
2017 Chrysler Pacifica SuperTech synthetic 5W20
2013 Yamaha XT250 Valvoline motorcycle 10W40
2006 GMC Sierra SuperTech high mileage 5W30

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