Engine Oil Type

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Engine Oil Type

Postby lostsole69 » Thu Jul 18, 2019 8:14 am

the manual for my 1952 CUB says use 20 wt is 15/40 to heavy for it?

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Re: Engine Oil Type

Postby Slim140 » Thu Jul 18, 2019 8:22 am

Any oil is better than no oil. :lol:

It should be fine.
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Re: Engine Oil Type

Postby inairam » Thu Jul 18, 2019 9:04 am

multi-weight oils were not around when the engine was designed or the manual written or updated. Many members use 15/40 oil.
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Re: Engine Oil Type

Postby john2189 » Thu Jul 18, 2019 9:32 am

[quote="Shane N."]Any oil is better than no oil. :lol:

Shane, that’s my line :D :D
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Re: Engine Oil Type

Postby MiCarl » Thu Jul 18, 2019 4:10 pm

When I first got my Cub I put in 15W40. When I changed it last fall I put in 10W30. I found that it turned easier cold but with warm weather it's smoking a bit and apparently leaking a little at the rear seal.

Next change I'll probably go back to 15W40.
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Re: Engine Oil Type

Postby Adamshan » Thu Jul 18, 2019 9:35 pm

I typically use rotella 15w 40 in everything I own and have yet to have any problems. If it's good enough for big diesel trucks it should be plenty good for old tractors.

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Re: Engine Oil Type

Postby TallCoolOne58 » Mon Jul 22, 2019 9:28 pm

In the world of personal biases and opinions, factoring in operator's manual recommendations, modern availability, knowledge and experience, my personal preference for 40+ F temps is SAE 30, specifically Castrol HD30. Daybreak temps drop consistently below 40 degrees F, Castrol 5W-20, since I have 6 volt positive ground, and where I live -22 F is by no means uncommon in winter, and I need it to start for snow plowing.

Edit: Although, to be honest, I have seriously considered the Shell Rotella T5 Synthetic Blend 15W-40 on more than one occasion.
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Re: Engine Oil Type

Postby Grizz » Tue Jul 23, 2019 12:14 am

For many years I have used 15-40 Delo in my Cub, H, and JD 1020, works very well and no issues.


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