L-3 test

L-3 test

[¦el ′thrē ‚test]
(engineering)
An engine test in a four-cylinder Caterpillar engine to determine stability of crankcase oil at high temperatures and under severe operating conditions.
References in periodicals archive ?
Busick, gave the L-3 tests for 30 years and wasn't told she had to conduct face-to-face interviews or check IDs until the day her files were seized.