Oily hair has a reputation for being high-maintenance in the wrong direction: too much of the good stuff rather than not enough. Which is true at the scalp. At the roots, excess sebum is the problem, and everything about a shampoo formula for oily hair is built around managing it. But oily roots and oily lengths are not the same thing, and the ends of oily hair can be just as dry and depleted as the ends of any other hair type.

This is where a lot of oily hair routines go wrong. The shampoo gets the scalp right. The conditioner is either skipped entirely (a surprisingly common choice for oily hair, and one that often makes things worse) or chosen on the wrong criteria, on the assumption that oily hair needs the lightest possible formula rather than the formula that suits the actual condition of the ends.

This article covers what oily hair needs at the scalp, what it needs at the lengths and ends, and why treating those as separate questions rather than one unified problem is what allows you to build a routine that actually works long-term.

For a broader buying guide covering dry hair shampoo and conditioner in any format (retail or DIY) best shampoo and conditioner for dry hair covers what to look for and why syndet bars consistently outperform the alternatives.

The thing most oily hair advice gets wrong

Almost every “best shampoo and conditioner for oily hair” recommendation treats oily hair as a uniform condition. Use a clarifying shampoo. Use a lightweight conditioner. Avoid anything rich. Keep it lean end-to-end. And that may be good for you, but it also may not be.

The problem: sebum is produced at the scalp. It travels down the hair shaft over time, affected by hair texture, length, porosity, and how often hair is washed. For short hair washed frequently, sebum may reach the ends before it accumulates. For longer hair, particularly fine, straight hair where the sebum travels relatively efficiently, the lengths can look oily while the ends are actually moisture-depleted, because the sebum that makes the roots greasy doesn’t make it all the way to the tips in the quantities that would actually benefit them.

And then there’s the washing frequency effect. Oily hair is typically washed more often than other hair types, sometimes daily, with surfactants designed to strip efficiently. The scalp produces more oil to compensate. The cycle continues. The ends are being stripped repeatedly without adequate conditioning and become drier while the roots stay oily. This is a real combination and a common one, and a routine that addresses only the scalp half of it solves half the problem.

Your shampoo addresses the scalp. Your conditioner addresses the ends. They’re doing different jobs for different parts of your hair, and they can be chosen independently.

What the shampoo needs to do

For genuinely oily hair, the shampoo formula needs to clean thoroughly. It needs to remove excess sebum efficiently, extend the window between washes, and leave hair that actually feels clean rather than lightly rinsed. The formula details that make this possible in a syndet shampoo bar:

High SCI percentage. SCI at 65% in the oily hair shampoo formula is doing really decent cleansing work. It’s a gentle surfactant at any percentage, but a higher concentration produces a more thorough cleanse per wash which is exactly right for hair that accumulates oil quickly. The full reasoning behind this is in the best shampoo bar for oily hair article if you want the complete picture.

A good amount of kaolin clay. At 6.6%, kaolin absorbs excess sebum at the scalp during washing and contributes to how long hair stays fresh between washes. This is the ingredient most directly targeted at the oily hair problem, not just cleansing but absorbing, extending the window before oil returns to visible levels. The day-two experience is noticeably different with clay versus without it.

Light conditioning profile. Jojoba oil at 2.4% and glycerine at 1% provide just enough conditioning and moisture to prevent a stripped result without adding anything that compounds the oiliness the formula is trying to address.

The result is a bar that earns its place in an oily hair routine by actually solving the problem rather than just managing it gently.

One thing worth knowing for longer-term syndet bar users: the scalp may gradually reduce its oil production after switching to a gentler surfactant. Sulphate shampoos strip efficiently enough that the scalp learns to compensate by producing more oil, a self-reinforcing cycle that can persist for years. A gentler syndet bar, used consistently, gives the scalp less reason to overproduce. My own scalp has been doing exactly this over several months of use. I’m not there yet, but I’m trending toward the normal hair formula and getting longer out of each wash before things start looking like I’ve changed the oil on a car and got my head in the way. I’ve had oily hair pretty much my whole life (since puberty) and roughly 30 years later this is the only thing that has actually made a difference. Full disclosure is that I’m probably in the early stages of perimenopause so there could also be some hormonal contributions to this change, but I do think it’s more the shampoo doing its thing.

If your scalp recalibrates similarly, the normal hair shampoo formula is the natural next step rather than a different bar entirely. It’s the same process, lower clay, a little more jojoba, adjusted for a scalp that’s settled into a lower baseline.

On conditioning oily hair — and why skipping it usually backfires

Around 18% of people with oily hair report never using conditioner, according to YouGov research published in January 2026 which is significantly higher than the general population. The reasoning is intuitive: if hair is already producing excess oil, why add more product?

The answer is that conditioner doesn’t go on the scalp and doesn’t interact with sebum production. Applied correctly (mid-lengths to ends only, never at the roots), a conditioner bar adds nothing to the oiliness problem and addresses the ends that the scalp’s oil production often doesn’t reach in useful quantities.

Skipping conditioner on oily hair typically produces dry, roughened ends alongside the oily roots which is a combination that’s harder to manage than either condition alone. The ends become prone to breakage, tangle more easily, and can make hair look dull and flat even on a day-one wash. Conditioning the ends is not counterproductive for oily hair. Using the wrong conditioner in the wrong place is.

What the conditioner needs to do — and why this is your decision

The conditioner’s job is to address the mid-lengths and ends, and what those need depends on factors that have nothing to do with the scalp’s oil production. Length, porosity, heat styling history, chemical treatment, and how the ends actually feel after washing are the relevant variables.

Oily roots and healthy ends need less conditioning than oily roots and bleached, heat-styled ends. The answer for both starts with the same shampoo bar but branches on the conditioner side. This is why, as with the dry hair routine, a blanket recommendation would be doing you a disservice. Here are the three base formulas and who each suits:

Lightweight conditioner bar — BTMS-50 at 57%, shea butter at 3%, minimal jojoba. The leanest formula, conditions without weight. Best for hair whose ends are in good condition, short or fine hair, and anyone who has previously found conditioner makes their hair look flat or heavy within hours of washing. If you’ve been skipping conditioner because every formula felt like too much, start here.

Moderate conditioner bar — BTMS-50 at 54%, shea at 6%, jojoba at 4%. The most broadly applicable formula. Provides good conditioning for ends that need more than a lean formula delivers, without the richness that fine or medium hair tends to find heavy. A sensible starting point if you’re unsure, the what conditioner bar should I use guide walks you through the decision in detail.

Deeply nourishing conditioner bar — BTMS-50 at 46%, shea at 15%, jojoba at 8%. The richest formula. Designed for ends that are dry, damaged, bleached, or colour-treated, which is hair that needs intensive moisture at the ends regardless of what the scalp is producing. Oily roots and dry, damaged ends is a real and common combination. This is the conditioner for that combination.

The point isn’t to find the one right conditioner for oily hair. It’s to find the right conditioner for your oily hair, at its specific length, with its specific history, and what its ends are telling you they need.

What this routine has done for real hair

My own hair is the primary reference point here. Fine, genuinely oily at the roots, shoulder-length, heat-styled most days. I use the oily hair shampoo bar and the moderate conditioner bar. The shampoo handles the scalp thoroughly with the kaolin clay at 6.6% being the ingredient that made the biggest practical difference to my day-two experience. The moderate conditioner handles ends that have some heat damage without adding anything that makes the roots look oilier faster.

I don’t need the deeply nourishing formula because my ends aren’t that depleted. But I do need more than the lightweight bar provides.

A friend with the same oily root situation uses the identical shampoo bar but chooses the deeply nourishing conditioner bar. Her ends are dry and colour-treated, and a lightweight or moderate formula wasn’t enough for them. She compared the bar directly to her previous expensive commercial conditioner, trying one in between uses of mine specifically to assess the difference. Her conclusion:

“Just used your shampoo and conditioner again (I did my expensive one in between) and nup, I genuinely love the one you made more! Very freaking good! My hair feels so clean!”

And after I made her a deeply nourishing formula and trying it for the first time:

“OK! I used the deeply nourishing conditioner! Very good. Much better for me than the previous one. The bar wasn’t soft either — the other one felt like it was gonna snap. And I’ve just brushed my hair and the brush is going through well. It feels so soft. Really really nice. I LOVE IT.”

The “previous one” was the moderate formula, not wrong, just not rich enough for her ends and the “snap” part referred to a previous formula that had less cetyl alchol (the bar hardener).

Same scalp type as mine. Same shampoo bar. Different conditioner because her ends needed something different from mine.

Building your own routine

For the shampoo: the oily hair syndet shampoo bar recipe is the starting point. It’s tested, the formula is fully documented, and every ingredient is explained so you understand what’s doing what. If after a few weeks your scalp has recalibrated and the bar starts to feel like slightly too much, the normal hair formula with lower clay, a little more jojoba is the next step. Scalp recalibration is real and your routine may need to adjust as it happens.

For the conditioner: use your ends as the guide, not your scalp type:

• Ends in good condition: lightweight.
• Normal condition with some dryness: moderate.
• Coarse, bleached, colour-treated, or heat-damaged ends: deeply nourishing.

The how to use a conditioner bar guide covers application technique, which matters particularly for fine oily hair where applying too high up the hair shaft is the most common error.

On the transition period: oily hair typically has the most pronounced transition when switching from sulphate shampoos to a syndet bar, because the scalp has learned to overproduce oil to compensate for frequent stripping and takes several weeks to recalibrate. The shampoo bar transition period article covers exactly what to expect and how long it lasts. The biology of why hair gets greasy during the switch is explained in more detail if you want to understand the mechanism rather than just manage the symptoms.

On conditioner frequency: if you’ve been skipping conditioner, introduce it on the ends only and assess over several washes before drawing conclusions. A lightweight conditioner bar applied correctly to mid-lengths and ends makes no contact with the scalp and has no mechanism for increasing root oiliness. If your hair feels heavier after introducing conditioning, check placement and amount before assuming the formula is wrong. The conditioner bar troubleshooting guide covers the most likely causes.

Be sure you’re starting with the right formulas, take the hair type quiz and find out if the oily hair shampoo really is right for you:

Why making your own gives you the routine, not just the products

A routine built from products you’ve formulated yourself is a routine you understand at the ingredient level. You know the kaolin is at 6.6% and why that number matters for your scalp. You know which conditioner formula you’ve chosen and what specifically it delivers for your ends. When something shifts, and scalp oil production does shift over time, with age, with hormones, with changes in washing frequency, you know which lever to adjust rather than starting over.

The iterative nature of DIY formulation is what makes it better than any commercial product for long-term routine building.

If you’re new to syndet bars and still deciding whether they’re worth trying, are shampoo bars good for your hair gives the honest assessment before you commit to buying ingredients. For the dry hair equivalent of this routine, the shampoo and conditioner for dry hair article uses the same framework applied to different needs.

Neets is a Brisbane-based home formulator and the founder of Batch and Bubble. She has an applied science degree, makes all her own bars, and has oily hair that has been gradually recalibrating since she stopped stripping it daily…which she considers a significant personal achievement.