Beauty Davines OI Shampoo vs OI Oil: Which One Should You Buy?
We put Davines OI Shampoo and Davines OI Oil head to head. Both are popular Davines OI hair products picks on Amazon. But they serve different buyers. This comparison breaks down price, formula, and results. By the end, you will know which one fits you.
| Factor | Davines OI Shampoo, 9.47 oz | Davines OI Shampoo and Conditioner Set |
|---|---|---|
| Price | Check price | Check price |
| Size | 9.47 oz bottle | 4.56 oz bottle |
| Key technology | Milky roucou oil shampoo | Multi-use beautifying oil |
| Best for | Daily washers who want shine | Styling and finishing |
| Ease of use | Easy, lather and rinse | Easy, a few drops |
| Finish | Soft, shiny, voluminous hair | Glossy, frizz-free finish |
| Overall value | Check price | Check price |
Our Verdict
Choose Davines OI Shampoo if you want daily cleansing with shine. Pick Davines OI Oil if you want a luxury finishing oil. For most buyers, buy both, they work best as a system.
More Top Picks in This Category
Not sold on either of these two? Here are more bestselling options worth considering.
Best for: Best for anyone with all hair types who wants to add shine and control frizz.
Davines OI Shampoo Refill, 16.91 oz
- 16.91 oz refill pouch
- eco refill for the OI shampoo
- Made to add shine and control frizz
- From Davines
Pros
- Targets frizz and dullness
- Suits all hair types
- Strong Amazon buyer ratings
Cons
- Results vary by hair type
- Check the size before ordering
Best for: Best for anyone with all hair types who wants to add shine and control frizz.
Davines OI Travel Set, 3.04 oz
- 3.04 oz travel sizes
- OI minis for trips and gym bags
- Made to add shine and control frizz
- From Davines
Pros
- Targets frizz and dullness
- Suits all hair types
- Strong Amazon buyer ratings
Cons
- Results vary by hair type
- Check the size before ordering
Best for: Best for anyone with all hair types who wants to add shine and control frizz.
Davines OI Oil Absolute Beautifying Potion, 4.56 oz
- 4.56 oz bottle
- multi-use oil for shine and frizz control
- Made to add shine and control frizz
- From Davines
Pros
- Targets frizz and dullness
- Suits all hair types
- Strong Amazon buyer ratings
Cons
- Results vary by hair type
- Check the size before ordering
Want the Full Picture?
Shampoo Bars: The Ignored Category
Shampoo bars are entirely ignored in choose-your-shampoo content despite being a common buyer question. The honest assessment: bars cleanse well and travel brilliantly, but most are soap-based with alkaline pH, which roughs the cuticle and fades color faster than liquid shampoo. Syndet bars, synthetic detergent bars, match liquid shampoo pH and are the better choice; check the ingredient list for sodium cocoyl isethionate rather than saponified oils.
Where bars fit: travel, gym bags, and buyers reducing plastic; the Davines OI Travel Set 3.04 oz covers the travel need in liquid form for those who prefer it. Where bars struggle: hard water areas, where soap bars leave significant residue; long or thick hair, where bars drag and tangle. The OI Shampoo Refill 16.91 oz is the economical home base; a bar is the travel companion, not the replacement, for most buyers. If a bar leaves hair waxy, that is soap scum, not moisture; switch to a syndet bar or go back to liquid.
Itchy Scalps and the "Itchy M" Preservatives
Methylisothiazolinone and methylchloroisothiazolinone, the "itchy Ms," are named in one blog but no selection guide tells shoppers how to avoid them. These preservatives are among the most common causes of scalp contact dermatitis from rinse-off products; the reaction is itch and redness that appears a day after washing. How to find products without them: scan the ingredient list for the full names or the abbreviations MI and MCI; they appear near the end of the list.
The Davines OI line positions as a cleaner formulation; verifying the preservative list is the due diligence for itchy-scalp buyers regardless of brand positioning. If itching started with a new shampoo, the preservative is a more likely culprit than the fragrance; fragrance gets blamed first but MI/MCI cause more documented scalp reactions. The OI Oil Absolute Beautifying Potion 4.56 oz as a finisher rarely causes scalp issues since it stays off the scalp; the shampoo is where the preservative question lives. Our hair massager guide covers the mechanical side of soothing itchy scalps, and our shower scrubber comparison tests manual brushes for gentle daily use.
Swimmers: Chlorine Management in Routine Selection
Chlorine management as part of routine shampoo selection, not a specialty topic, is never done. For regular swimmers, the shampoo rotation needs a chelating or swim-specific wash weekly; a gentle daily shampoo cannot remove chlorine buildup alone. The pre-swim system matters more: saturate hair with clean water and conditioner before entering, so the hair absorbs less chlorinated water.
The OI Shampoo as the daily driver plus a weekly chelating wash is the swimmer's structure; the OI Oil after swimming restores what the chelating wash stripped. For blonde swimmers, the green-tinge risk makes the chelating step non-negotiable; purple shampoo does not fix chlorine green, only a chelator removes the copper deposits. Rinse immediately after every swim; letting chlorine dry on the hair compounds the damage. The travel set's small sizes suit the swim bag for post-pool washing on the go.