0W-16 vs 0W-20 Engine Oil
Reviewed by GarageDex editorial
0W-16 is thinner when hot than 0W-20, built for the newest fuel-economy-focused engines. Some engines accept 0W-20 as a fallback; many newer ones require 0W-16. Check the cap and manual.
| 0W-16 | 0W-20 | |
|---|---|---|
| Cold-start flow | 0W (same) | 0W (same) |
| Thickness when hot | Thinner (16) | Thicker (20) |
| Fuel economy | Best | Very good |
| Typical use | 2018+ Toyota, Honda hybrids | Most modern engines |
0W-16 is one of the thinnest mainstream grades, specified on recent Toyota and Honda engines (often hybrids) to squeeze out fuel economy. It needs an engine designed for it.
Some manuals list 0W-20 as an acceptable substitute for short-term use if 0W-16 is not available, but the reverse is not safe: do not put 0W-16 in an engine that calls for 0W-20 or thicker.
Which should you use?
Use 0W-16 if your engine specifies it. 0W-20 is only a temporary fallback where the manual explicitly allows it.
Frequently asked
Can I use 0W-20 instead of 0W-16?
Only short-term, and only if your owner's manual lists 0W-20 as an acceptable alternative. For best economy and to stay in spec, use 0W-16.
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