The right engine oil

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capefarm
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The right engine oil

Postby capefarm » Fri Dec 14, 2018 9:37 am

Likely it's been covered before, but I'm relatively new to this forum.
I've been told not to use 10W30 oil in my Cub, only non-detergent, non-synthetic SAE 30. Is this correct?

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ricky racer
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Re: The right engine oil

Postby ricky racer » Fri Dec 14, 2018 10:25 am

10W-30 is fine. That's what I run. Non-detergent oil is meant for engines without filters. Detergent oils are made for engines with a filter which your Cub has.
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Re: The right engine oil

Postby jsfarmall » Fri Dec 14, 2018 12:28 pm

Welcome to the forum, lots of great knowledge here. Non detergent oil is what they originally ran on. Probably all that was there at the time. Detergent oils are just fine. I use rotella 15w 40. Was recently deciding on a cheaper oil but decided to stay with name brand. Main thing with oil is get a good quality and stay with it. That's what I'm doing.
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Re: The right engine oil

Postby John *.?-!.* cub owner » Fri Dec 14, 2018 3:12 pm

If you know what was in it before, I suggest sticking with the same thing. If I rebuild one, I use 10w30 detergent oil in it.
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Re: The right engine oil

Postby capefarm » Fri Dec 14, 2018 3:25 pm

Thank you both so very much. I very much appreciate the knowledge available here. And perhaps I might add to it from experience in a place surrounded by the sea: When making up 'ground tackle' for our moorings in the Bay, we coat all threads in steel shackles, etc. with undiluted pine tar. That way they never ever seize, even when left underwater for months. I have done this when refastening parts during restoration of our '49 Cub, since it's likely to outlast me.

Thank you again.

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Re: The right engine oil

Postby BigBill » Sat Dec 15, 2018 8:32 pm

Winter oil and cub farmall or int154/184/185. 10-30wt, summer 15/40wt

Cub cadet summer oil 30wt, winter 10/30.

When not sure check the manufacturers owners manual.
I'm technically misunderstood at times i guess its been this way my whole life so why should it change now.

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Re: The right engine oil

Postby kully560 » Fri Dec 21, 2018 4:06 pm

I USE THE NEWER DIESEL ENGINE OIL 10W-30W AS IT HAS A HIGHER ZINC CONTENT . ROTELLA T4 10W-30W YOU CAN BUY IT AT AUTOZONE, TRACTOR SUPPLY

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Re: The right engine oil

Postby Bermuda Ken » Mon Jan 07, 2019 12:01 am

I use what IH says to use.....30W LO-ASH oil. In gassers you need a lower sulfated ash content to ward off a large list of engine issues. The 10-30 and 15-40 oils in the world may/do NOT have this. Why risk a failure??
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Re: The right engine oil

Postby inairam » Mon Jan 07, 2019 6:52 am

Bermuda Ken wrote:I use what IH says to use.....30W LO-ASH oil.


The oils available today were not even conceived of in the 1940s when the engine was designed and even the 1970 when they stop making the engine.

Any modern detergent multiweight or single weight oil from a name supplier is more than safe for the cub engine.
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Re: The right engine oil

Postby Lt.Mike » Mon Jan 07, 2019 9:28 am

There’s lots of correct opinions on this but one thing is certain. The wrong oil and filter for the Cub is the oil that hasn’t been changed.
Anything’s a huge step up from that.

Me personally I’m a Mobil1 believer.
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Re: The right engine oil

Postby radioguy41 » Mon Jan 07, 2019 9:54 am

Bermuda Ken wrote:I use what IH says to use.....30W LO-ASH oil. In gassers you need a lower sulfated ash content to ward off a large list of engine issues. The 10-30 and 15-40 oils in the world may/do NOT have this. Why risk a failure??

Agree, IH 30W Lo-Ash. Multi-vis, diesel, or synthetic might work but I don't see an upside, and it would have to be a significant upside, for moving away from the mfg's recommendation.

inairam wrote:The oils available today were not even conceived of in the 1940s when the engine was designed and even the 1970 when they stop making the engine.

That's true but the same could be said about manual transmission oil and you would never put the newest oil into an older manual tranny with yellow metal synchros because additives in it will destroy those synchros. Newer does not necessarily translate to better when applied to antique vehicles.
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Tractors Owned: 1948 with international 1000 loader 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
1950 with plow, 54 blade, mott mag 6v - Roxanne
1953 54 blade, c22, wood 42 6v
1957 with c-2 mower & c-54 grader blade 6v - barn Queen
1965 lo-boy with c-3 mower 12 v - Loboy
1975 with homemade mower 12 v - Horse
1979 long strip 12 v
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Re: The right engine oil

Postby inairam » Mon Jan 07, 2019 10:31 am

I think these engines are robust and not very picky. Short of running olive oil I think most of the motor oil you can buy at today will be fine.

I do agree that there are issues with gearbox oils related to sulfur but this discussion is motor oils.
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Re: The right engine oil

Postby ntrenn » Mon Jan 07, 2019 12:40 pm

I know they don’t like running with the crankcase full of hydraulic fluid...,

I run 15w40 year round...it will pump down to 10 below...good enough for me...

kully560
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Re: The right engine oil

Postby kully560 » Thu Jan 10, 2019 12:39 pm

years ago the motor oils had a much higher zinc content for lube . with todays motors now required is low zinc content and 1% or less ash content that is why I use diesel engine oil


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