Diesel Motor Oil 2024 Test: Which Brand Wins?

2nd in its 4-way heat (behind Royal Purple 2.98, ahead of Rotella T6 3.08 and Schaeffer's 3.13)

3rd in its 4-way heat

1st in its 4-way heat, 2nd fastest of all six oils overall behind Hot Shot's

4th (last) in its 4-way heat

fastest of all six oils overall; easily beat Amsoil in their direct pairing

no explicit time given; lost decisively to Hot Shot's (2.46 seconds), 'doesn't have a chance'

to 387.81 g, 6.75 g evaporated, worst (most evaporation) of all six oils

to 397.96 g, 6.64 g evaporated, narrowly beat Mobil Delvac (6.75 g) in their direct pairing but 5th-best of all six overall

to 394 g, 5.25 g evaporated, best at the time tested, ultimately 2nd-best of six behind Amsoil (4.14 g)

to 399.49 g, 6.23 g evaporated, moved into 2nd place at the time tested, ultimately 4th-best of six

to 405.33 g, 5.52 g evaporated, 2nd place at the time tested, ultimately 3rd-best of six overall

to 414.77 g, 4.14 g evaporated, best (least evaporation) of all six oils, 'very impressive'

worst (largest) of all six oils

beat Mobil Delvac (5.94 mm) but narrowly outperformed by Royal Purple (5.6 mm); 5th-best of six overall

barely beat Rotella T6's 5.63 mm; 4th-best of six overall

by far the best at the time tested, beat Royal Purple; ultimately 2nd-best of six overall behind Amsoil (5.22 mm)

2nd place at the time tested, ultimately 3rd-best of six overall

best (smallest) of all six oils, 'very impressive'

slowest in its 4-way heat, no explicit time given ('really needs to get a move on it')

in its heat at 134.2 seconds, distant second overall behind Hot Shot's (95.4 seconds)

in its heat at 142 seconds

in its heat, no explicit time given

fastest of all six oils at 95.4 seconds, a 'huge win' over Amsoil

no explicit time given; lost badly to Hot Shot's, 'not liking the cold temperature'

in its heat, took the win by a very small lead; the only oil with no change in flow speed after heat exposure

in its heat; flow speed slowed after heat exposure, unlike Mobil Delvac

in its heat

(last) place in its heat

easy win over Amsoil in its heat; placement vs the four-oil group not stated

lost easily to Hot Shot's again, no explicit time given

(last) place in its heat, 'does not like the cold', no explicit time given

in its heat at 142.8 seconds, distant second overall behind Hot Shot's (almost 108 seconds)

in its heat this time, lost a step from 2nd place in the uncooked cold test; no explicit time given, described as trailing Schaeffer's 154.9 seconds

in its heat at 154.9 seconds, held up well after heat exposure, improved from 3rd to 2nd relative to Royal Purple

fastest of all six oils again at almost 108 seconds

no explicit time given; 'still struggling', about halfway down the track when Hot Shot's finished

lowest of all six oils

no specific ppm given in the summary; narrator says 'a little bit higher anti-wear additive content would make this oil even better', implying below average

not the ppm leader; narrator describes anti-wear content as 'pretty low'; detergent/dispersant package 2,129 ppm, 2nd highest behind Schaeffer's

2nd-best of six behind Amsoil (2,129 ppm); highest detergent/dispersant package of all six oils at 2,141 ppm

no specific ppm given; narrator calls the package 'a little bit light' though it performed well on the lubricity test

best of all six oils; detergent/dispersant package 2,048 ppm