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Motor and transmission oil substitute |
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bigbirdww
Bronze Level Joined: 20 Aug 2021 Location: Ipswich MA Points: 12 |
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Posted: 27 Jan 2022 at 7:44am |
My 48 AC-C calls for SAE 20 motor oil and transmission oil which I can not find. What are good substitutes?
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Tbone95
Orange Level Access Joined: 31 Aug 2012 Location: Michigan Points: 11434 |
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Any oil you buy today is going to be far superior to the best available in 1948.
I would say 10W 30 would work good for the engine, and universal tractor oil in the tranny. |
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steve(ill)
Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 78341 |
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Tbone is right. A good 10w30 in the engine ( 4 quarts) and Universal Hydraulic/ Transmission fluid in the transmission/ pto/ hydraulic case ( 7-8 quarts) .
Edited by steve(ill) - 27 Jan 2022 at 8:17am |
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Like them all, but love the "B"s.
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bigbirdww
Bronze Level Joined: 20 Aug 2021 Location: Ipswich MA Points: 12 |
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Thanks for the reply and I will try the 10-30. What would you use for the final drive. Cant find 145w. Thanks
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1948 AC-C
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Greg (Hillsboro, OH)
Orange Level Joined: 11 Sep 2009 Location: Hillsboro, OH Points: 1163 |
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in old engines such as this, would it be beneficial to use a non-detergent oil so as to not loosen years of crud?
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jvin248
Silver Level Joined: 17 Jan 2022 Location: Detroit Points: 270 |
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. Getting harder to find '10w'-anything anymore as many new vehicles are 5w- and even 0w- synthetics. When I'm on my tractor out there in two degrees winter trying to get the groaning starter and chilled battery to turn over the engine just fast enough to fire, I seriously think about what the next oil change will contain ... .
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Ray54
Orange Level Access Joined: 22 Nov 2009 Location: Paso Robles, Ca Points: 4378 |
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I would guess a gear oil , but only a guess.
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steve(ill)
Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 78341 |
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you can use 80w90 weight or 75w140 in the final drives... Some of the later tractors even started using the Universal Tractor Fluid....... but i prefer the Gear Lube.
if you have trouble finding 10w30 ( i dont), then 5w30 would be OK... The last number is the normal motor weight ( 30 wt)... The first number is the winter start number.. so similar to a5 or 10wt when cold .. easier starting than the old straight 20w or 30 w.
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Like them all, but love the "B"s.
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Stan R
Orange Level Access Joined: 03 Dec 2009 Location: MA Points: 953 |
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When we converted our tractors from 30W to detergent 10W-30, we changed the oil and filter after about 20 hours of use, then again after 50 hours of use. Never saw any issues. Not sure if this is right or wrong, but made sense at the time.
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steve(ill)
Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 78341 |
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I agree with STAN.. Everything i own uses Detergent Oil... Change the oil NOW and monitor.. If it looks like crap after 20 or 50 hours then change it out.. Better to get any CRUD out of the motor as compared to let it set... I have NEVER had a problem converting an old motor to Detergent.
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Like them all, but love the "B"s.
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corbinstein
Orange Level Joined: 31 Jul 2014 Location: Oklahoma Points: 796 |
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Rotella 10W30 or 40 should have Zinc, which is sorta necessary I hear for flat tappet engines.
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bigbirdww
Bronze Level Joined: 20 Aug 2021 Location: Ipswich MA Points: 12 |
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Thank you for all of your responses. What a great site for wisdom. I did reach out to Lucas Oil for 145 W gear oil. I thought you might want to see their response.
Thank you for your interest in Lucas Oil Products. We do not offer a straight weight SAE 145 gear oil. We have two gear oils that are multi-weight, SAE 85w140 #10042 and SAE Synthetic 75w140 #10121. These two gear oil are an API GL-5 meaning the EP (Extreme Pressure) additive has a high concentrate of sulfur and phosphorus which can be corrosive to soft metals like brass, bronze and copper. These gear oils are designed for hypoid gear sets for vehicles. So I would say unfortunately we do offer a product for your application. Have a great day! |
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1948 AC-C
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steve(ill)
Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 78341 |
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just go with the 80w90...
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Like them all, but love the "B"s.
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SteveM C/IL
Orange Level Access Joined: 12 Sep 2009 Location: Shelbyville IL Points: 8061 |
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It don't hurt to pay attention to the GL4-GL5 differences. I don't know if any thing in these old tractors has the bronze bushing to worry about(GL5)
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