The Allis Chalmers S tractor has a published engine oil capacity of 20 US quarts (18.93 litres). For tractors in the 10.0+ L engine-size class, that is very low versus a peer average of 38.9 quarts. For a routine oil change, having 5 × 1-gal jugs (about exact) on hand covers the published capacity.
The Allis Chalmers S has one published engine-oil capacity in this dataset. The listed capacity is 20 US qt (18.93 L). Oil capacity can vary by engine, fuel configuration and production revision, so confirm the specification for the exact tractor before servicing.
Tractor-engine benchmark
How this oil capacity compares
Peer values use tractors in the same engine-size class.
Engine oil capacity
Very low
20 qt
Low27 qt
This model20 qt
Average38.9 qt
High52 qt
Typical low and high use the 10th and 90th percentile of this engine-size group, which avoids one unusual tractor distorting the scale.
