The Most Common Engine Oil Viscosity
Across 3,710 US vehicle configurations in the GarageDex database, the most common factory oil grade is 5W-30 (50.2%), followed by 0W-20 and 5W-40. The shift toward thinner grades like 0W-20 is driven by fuel-economy standards.
Oil viscosity grades by share of vehicles
5W-3050.2% · 1864
0W-2030.3% · 1123
5W-407.4% · 274
5W-204.8% · 177
0W-303.3% · 123
0W-402.4% · 89
10W-401.1% · 39
15W-400.4% · 14
| Rank | Viscosity | Share of vehicles | Vehicles |
|---|---|---|---|
| 1 | 5W-30 | 50.2% | 1,864 |
| 2 | 0W-20 | 30.3% | 1,123 |
| 3 | 5W-40 | 7.4% | 274 |
| 4 | 5W-20 | 4.8% | 177 |
| 5 | 0W-30 | 3.3% | 123 |
| 6 | 0W-40 | 2.4% | 89 |
| 7 | 10W-40 | 1.1% | 39 |
| 8 | 15W-40 | 0.4% | 14 |
Methodology
Counts reflect the primary engine's factory viscosity for distinct year/make/model configurations in the GarageDex database, each from a cited source. Many vehicles offer more than one engine; grades vary by engine and model year. Compare grades in our viscosity guides.
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