The Most Common Engine Oil Viscosity
Across 4,367 US vehicle configurations in the GarageDex database, the most common factory oil grade is 5W-30 (47.5%), 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-3047.5% · 2076
0W-2027.8% · 1214
5W-409% · 394
0W-305.2% · 228
0W-404.2% · 182
5W-204.1% · 177
10W-600.9% · 41
10W-400.9% · 40
| Rank | Viscosity | Share of vehicles | Vehicles |
|---|---|---|---|
| 1 | 5W-30 | 47.5% | 2,076 |
| 2 | 0W-20 | 27.8% | 1,214 |
| 3 | 5W-40 | 9% | 394 |
| 4 | 0W-30 | 5.2% | 228 |
| 5 | 0W-40 | 4.2% | 182 |
| 6 | 5W-20 | 4.1% | 177 |
| 7 | 10W-60 | 0.9% | 41 |
| 8 | 10W-40 | 0.9% | 40 |
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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