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twinson 
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 Topic: Allis Sae 20W20 barel of oil.
Posted: 04 Oct 2026 at 10:24pm |
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I have a sealed 55gallon barrel of Sae 20W20 oil from Allis. I no longer need this. Any interest. Thank you. Jim
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DrAllis
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Posted: 04 Oct 2026 at 11:15pm |
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Hydraulic oil ?????
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twinson
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Posted: 05 Oct 2026 at 7:48am |
Barrel is labeled SAE so I was thinking Motor Oil.
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DrAllis
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Posted: 05 Oct 2026 at 9:53am |
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Probably a gasoline engine type of oil, I'd imagine.
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john2189
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Posted: 05 Oct 2026 at 10:20am |
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Hydraulic oil is labeled SAE too
My mistake, hydraulic oil is aw or iso
Edited by john2189 - 05 Oct 2026 at 10:25am
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'41 Allis B
'49 Farmall Cub
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twinson
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Posted: 05 Oct 2026 at 12:21pm |
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I was thinking WD-45, D17, D19 as we used to have those tractors for light duty use.
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steve(ill)
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Posted: 05 Oct 2026 at 12:54pm |
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SAE is Society of AUTOMOTIVE ENGINEERS... which means the oil must be ENGINE COMPATABLE... 20W20... basiclly means its a straight 20wt engine oil.... You can use 2owt engine oil as HYDRAULIC oil in most of the older tractors... maybe pre 1960..
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Like them all, but love the "B"s.
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steve(ill)
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Posted: 05 Oct 2026 at 12:59pm |
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newer HYDRAULIC OILS are labeled "AW" .. which means it has ANTI WEAR addatives in it specifically for valves, pistons and pumps... normally with anti FOAM additives also..
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Like them all, but love the "B"s.
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DrAllis
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Posted: 05 Oct 2026 at 6:43pm |
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Well, if it says ALLIS-CHALMERS on the barrel, it should be pre-1985 for age, which would make it 40 years old minimum. From about 1970 onward, the hydraulic oil was "Power Fluid 821", which was used in transmissions and hydraulic systems. In a D-19 owners manual, the hydraulic oil requirement was SAE 20-20W non-detergent of "ML" service classification. It's hard for me to believe there isn't anything else printed on the barrel to help figure out what type it is.
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Les Kerf
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Posted: 05 Oct 2026 at 7:20pm |
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My late Father-in-law ran Pennzoil 20W20 motor oil in his vehicles and the WD Allis year 'round. I haven't seen it for sale in many years now.
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Mikez
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Posted: Yesterday at 6:42am |
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Can you post pictures
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steve(ill)
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Posted: Yesterday at 6:49am |
1. The Meaning Behind the Two RatingsHistorically, the SAE separated 20-weight oils into two distinct designations based on temperature testing: - 20W (Winter Grade): The "W" stands for Winter, not weight. This rating means the oil was specifically tested for its "cold cranking" ability and flowability at sub-zero temperatures (usually around -15°C) to ensure an engine could start in cold weather.
- SAE 20 (Straight Grade): This rating means the oil was tested for its kinematic viscosity at normal engine operating temperature (100°C or 212°F) to ensure it remained thick enough to protect components once the engine warmed up.
2. Why it wasn't just called "20 wt" An oil could technically pass the high-temperature test to be called an "SAE 20" but fail the cold-temperature test because it contained too many natural waxes that solidify in the winter. Conversely, an oil could pass the cold-flow "20W" test but thin out too much at 100°C to meet the tight window required for a standard "SAE 20". When refining techniques advanced, manufacturers produced high-quality base oils that easily passed both the cold-weather cranking limits of a 20W and the hot operating limits of an SAE 20 without needing chemical viscosity index improvers. To prove to consumers that the oil was safe for year-round use (both winter starting and summer driving), they explicitly labeled it 20W-20
Edited by steve(ill) - Yesterday at 6:50am
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Like them all, but love the "B"s.
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