Once you’ve found the right viscosity (0W-20, 5W-30, etc.),
It’s time to decide which oil to use.
- Traditional: Cheaper but less complicated
- Blend: A blend of conventional and synthetic oils. This is an inexpensive oil with improved oil refining.
- Synthetic: most expensive but most sophisticated to achieve constant viscosity.
- Note: Some cars require fully synthetic oil. If the manual says to use the combination, use the combination.