How to use face oil — where it fits and what it does.

Face oils occupy two distinct roles in a skincare routine — cleansing and moisturising — and confusing them produces either underwhelming results or a routine that feels heavy and congested. The chemistry behind each use case is straightforward and worth understanding once.

Oil as a cleanser

The principle behind oil cleansing is that like dissolves like. Excess sebum, sunscreen, and oil-soluble residue that accumulates on the skin during the day does not dissolve efficiently in water alone. An oil-based cleanser attracts and binds this residue, which can then be emulsified and rinsed away.

A well-formulated cleansing oil contains surfactants that allow it to emulsify on contact with water — it rinses cleanly, leaving neither an oily film nor stripped skin. The resulting skin state is different from a water-based cleanser used alone: the barrier is intact, surface lipids are not overcleaned, and the skin does not produce the compensatory oil surge that often follows stripping cleansers.

Cleansing oil belongs at the first step of an evening double cleanse. Apply to dry skin, massage for 30–60 seconds, add a small amount of water to emulsify, then rinse. A gentle water-based cleanser follows to remove any remaining water-soluble residue.

Morning cleansing with a cleansing oil is generally unnecessary — the skin has not accumulated the oil-soluble load overnight that warrants it. A gentle water-based cleanser or a simple rinse with water is sufficient for most people in the morning.

Who benefits most. Anyone wearing SPF daily — which is everyone — benefits from oil cleansing, because modern mineral and chemical sunscreen formulations are designed to resist water and sweat and do not remove efficiently with a water-based cleanser alone. Dry and sensitive skin types benefit from the gentler barrier preservation. Oily skin types often find, counterintuitively, that oil cleansing reduces the compensatory oil production driven by stripping cleansers.

Oil as a moisturiser

When applied after a water-based moisturiser or serum, a facial oil acts as a sealant — reducing the rate of transepidermal water loss and providing an additional lipid layer on top of the barrier. This is the occlusive function.

The key distinction from a cleansing oil is that a moisturising oil is applied to damp, prepared skin after all water-based treatments, as one of the last steps in the routine. Applied to dry skin as the only moisturising step, oil can feel heavy and provide less benefit than when layered over a humectant-containing product.

The correct layering sequence: Humectant serums (hyaluronic acid, glycerin) → Moisturiser (emulsion with barrier ingredients) → Facial oil (occlusive sealant). If an oil is applied before a water-based product, it forms a barrier that reduces the absorption of the subsequent product — the reverse of what the routine is trying to achieve.

Not every skin type needs a facial oil as a separate step. A well-formulated moisturiser already contains emollient and occlusive components. Dry skin types in low-humidity environments benefit most from the additional sealing layer. Oily and acne-prone skin types should look for oils with low comedogenic ratings (squalane, jojoba) and may find them more useful as occasional treatments than daily steps.

Choosing the right oil

Not all facial oils behave the same way, and the distinctions matter:

Dry oils — squalane, jojoba, rosehip — absorb quickly and leave minimal residue. Well-suited to daily use and to oily or combination skin that still benefits from a sealant step.

Heavier emollient oils — argan, marula, sea buckthorn — take longer to absorb and provide more occlusion. Best for dry skin, night-time use, and skin in barrier-recovery phases.

Comedogenic potential varies significantly. Coconut oil and flaxseed oil rate high on the comedogenic scale and are poorly tolerated by acne-prone skin despite their overall skin-care benefits. Squalane and jojoba oil are among the least comedogenic options and are widely tolerated.

Common mistakes

Using a cleansing oil without water. A cleansing oil requires water contact to emulsify and rinse. Applied and removed with cotton pads or without water, it leaves residue on the skin and does not achieve the clean intended.

Applying moisturising oil before water-based products. As above — oil is the final layer, not an intermediate one.

Expecting a moisturising oil to work without a humectant underneath. Oils seal; they do not supply water. A serum or moisturiser with humectant content (glycerin, hyaluronic acid) underneath gives the oil something to lock in.

Avoiding oil entirely due to oily skin. The oils most associated with congestion are heavy plant butters and high-oleic oils, not the lightweight dry-oil category. A non-comedogenic facial oil used as the final evening step — over a moisturiser — is tolerated by the majority of oily skin types without increasing congestion.

The summary

A cleansing oil is a first-step evening cleanser that dissolves the day's oil-soluble residue — including SPF — without stripping the barrier. A moisturising facial oil is a final-step sealant applied over water-based products to reduce moisture loss. They are used at opposite ends of the routine, for different purposes, and with different techniques. Understanding this makes both significantly more effective.