Motor Oil 2025 Test: Which Brand Wins?

dropped to 402.13 g, a loss of 8.69 g; lost this specific 2-oil comparison to the Mobil 1 10W-30's 5.26 g loss

dropped to 399.42 g, a loss of only 5.26 g; won this specific 2-oil comparison against the Motorcraft diesel oil

dropped to 400.12 g, a loss of 5.71 g; lost this specific comparison to the Phillips 66 aviation oil's 2.39 g

dropped by only 2.39 g, the best (lowest) evaporative loss of all six oils tested

lost only 2.62 g, second best of all six oils, very close behind the Phillips 66 aviation oil

lost a total of 5.25 g

wear scar, beat the Mobil 1 10W-30's 6.23 mm; finished a very close second overall (across all 6 oils) behind the Motul motorcycle oil's 5.47 mm

wear scar, about 12% larger than the Motorcraft diesel oil's scar; lost this specific comparison

wear scar, described as the most damage of any oil tested in this video

wear scar, second worst of the lineup, close behind the Mobil 1 0W-8's 6.56 mm

wear scar, the BEST (smallest) of all six oils tested

wear scar, described as better than average but not enough to beat the Motorcraft diesel's 5.57 mm

more than 1,000 parts per million phosphorus for better wear protection, recommended for power stroke diesel engines, warns against use in catalyst-equipped gasoline engines

designed to last 10,000 miles, claims 10 times more wear protection, fights sludge

designed to increase engine efficiency, provide startup protection, and fight sludge

claims easier starting and quick lubrication at low temperatures, claims high film strength for wear protection at high temperatures

claims to outperform automotive oils in marine applications, provides wear and corrosion protection, eliminates thermal breakdown under extreme RPM/temperature/load

slower than the Mobil 1 10W-30 in the diesel/gasoline/0W-8/aviation race

finished second in the diesel/gasoline/0W-8/aviation race at 1 minute 11 seconds

by far the slowest oil in its race, finishing in about 3 minutes 22 seconds

finished about a minute slower than the marine oil in their race at 2 minutes 37 seconds

won its race against the Motul motorcycle oil, finishing in about 1 minute 40 seconds versus Motul's 2 minutes 37 seconds

finished third in that group's race at 1 minute 47 seconds; only slowed by 8% after heat exposure, the best (least) percentage slowdown of the three oils given a specific percentage figure

passed the Motorcraft to finish second in that group at 1 minute 38 seconds

remained the slowest, finishing in about 4 minutes 20 seconds

finished in 3 minutes 33 seconds, notably slower than the marine oil's 1 minute 53 seconds

won again, finishing in 1 minute 53 seconds versus Motul's 3 minutes 33 seconds

USA

USA

USA

France

blended in the US with foreign and domestic materials

advanced full synthetic

extremely thin viscosity full synthetic

mineral-based ashless dispersant multigrade oil for aviation piston engines

claims 100% synthetic, may contain ester

helping explain its strong lubricity test result

described as a very aggressive anti-wear additive package, about twice the content of the Mobil 1 10W-30

described as a very good additive package