Start with the manual
The best oil is the one that meets your vehicle manufacturer's specification. Viscosity, certification, and change interval matter more than generic labels.
Where synthetic oil helps
Synthetic oil can perform better in heat, cold, towing, turbocharged engines, and longer service intervals when approved by the vehicle maker.
Comparison table
| Feature | Synthetic oil | Conventional oil |
|---|---|---|
| Temperature stability | Usually stronger | Adequate for many older vehicles |
| Price | Usually higher | Usually lower |
| Intervals | May allow longer intervals if approved | Often shorter intervals |
| Best fit | Modern, turbo, severe use | Some older or simple engines |
FAQ
Can I switch from conventional to synthetic?
Often yes, if the oil meets your vehicle specification. Confirm with the owner manual or shop.
Is synthetic always required?
No. Use what your vehicle requires. Some vehicles specify synthetic or a particular standard.
Does synthetic oil fix engine problems?
No. Oil choice cannot repair leaks, worn parts, or neglected maintenance.