**The 13 Best Hair Oils for Smooth, Shiny Hair – Tested on Three Different Hair Types** Hair oils have become essential for many people looking to add shine, reduce frizz, and improve the overall health of their hair. These products can help smooth the hair, tame flyaways, and make split ends and damage from heat styling or bleaching less noticeable. Celebrity stylist Lorraine Dublin, who has worked with stars like Serena Williams and Cynthia Erivo, says hair oils can be useful for more than just adding shine. She uses them for everything from scalp treatments to protective styles and even when using extensions. However, she warns that some oils just sit on top of the hair and don’t provide enough moisture. To find the best formulas for different hair types and concerns, I tested a range of affordable and high-end oils with two expert reviewers who have curly and coily hair, alongside my own straight hair. Together, we evaluated how each product performed in real-life situations, considering factors like weight, shine, nourishment, frizz control, and compatibility with different hair textures. **Best Overall – Olaplex No.7 Bonding Oil** Olaplex’s No.7 Bonding Oil was the top performer in our tests. It’s lightweight, doesn’t leave hair feeling greasy, and provides a noticeable shine. It also helps protect hair from heat damage and can be used on both damp and dry hair. The oil’s scent is pleasant but not overpowering, and it’s vegan and cruelty-free. Users found that it improved the look of their hair immediately, making it appear less damaged. It’s also long-lasting, with one small bottle lasting several months with regular use. **Best Budget Buy – L’Oréal Paris Elvive Extraordinary Oil** For those on a budget, L’Oréal Paris’s Elvive Extraordinary Oil is a great option. It’s affordable, lightweight, and provides a shiny finish without weighing hair down. It’s particularly effective for sealing moisture into curls and coily hair without causing buildup. The oil has a sweet, amber-like scent and comes with a convenient pump for easy application. While it’s not as long-lasting as some of the higher-priced oils, it still delivers good results for the price. **Best for Curls – Dyson Omega Hydrating Hair Oil** Dyson’s Omega Hydrating Hair Oil is an excellent choice for those with curly or coily hair. It’s lightweight yet deeply nourishing, helping to maintain curl definition and prevent frizz. The oil has a floral scent and comes in a sleek, geometric bottle that’s easy to use. It’s more expensive than other options, but users found it to be highly effective, especially in humid conditions where it helps maintain curl shape without making hair feel heavy. **Best for Straight Hair – Champo Weightless Hair Oil** For those with straight hair, Champo’s Weightless Hair Oil is ideal. It’s designed to be used on dry hair only and helps reduce the appearance of split ends without weighing hair down. The oil has a natural, spa-like scent and is vegan and cruelty-free. It’s particularly useful for those who want a quick fix for dryness or a sleek finish without the need for heat styling. In conclusion, the best hair oil depends on your specific hair type and needs. Whether you’re looking for a lightweight oil for curls or a heavy-duty treatment for damaged hair, there’s an option that can help improve the health and appearance of your hair.