Mustard Oil for Pooja: Diyas, Shani Dev & Hanuman

Yes — pure kachi ghani mustard oil (sarson ka tel) is widely used for pooja, above all as the fuel for a diya. Across much of North India it is the classic oil for a Saturday lamp offered to Shani Dev, and it is lit for Lord Hanuman on Tuesdays and Saturdays, so many families keep a small bottle aside just for the mandir. Tradition holds that a mustard-oil diya pleases Shani and clears heavy, negative energy from a home; more practically, the oil burns with a steady, bright flame and is stocked in every Indian kitchen, which is how it became the everyday lamp oil. The finer customs — which day to buy it, whether to donate it on Shanivar, and whether to cook with it during a vrat — vary by region, community and family. None is a fixed rule that binds everyone, so the surest guide is what your own elders keep.

Can you use mustard oil for pooja?

Yes. In Hindu households mustard oil is one of the most common oils for lighting a pooja diya, especially in the worship of Shani Dev and Hanuman. Its role is as lamp fuel — and on Saturdays as oil offered directly at Shani temples — rather than as a prasad or naivedya you eat. For many satvik pujas, and for deities like Lakshmi and Vishnu, a ghee lamp is preferred; mustard and sesame oil are the ones traditionally tied to Shani and Hanuman.

• Evening aarti and daily diya, especially in North Indian homes
• Saturday (Shanivar) worship of Shani Dev, at home or at a Shani mandir
• Hanuman puja on Tuesdays and Saturdays
• A lamp lit under a peepal tree, a custom linked to Shani
• Oil poured or offered directly on the Shani idol at temples

For a Shivling, the classic offerings are water, milk, bel patra, bhang and dhatura rather than oil; some devotees do light a mustard or sesame oil lamp before Lord Shiva, but the oil is generally not poured over the ling the way it is for Shani. As with most of these practices, families and regions differ, so it is best to go by your own family's observance.

Why is mustard oil offered to Shani Dev?

Mustard oil is offered to Shani Dev because, in tradition, dark and heavy things are associated with Shani (Saturn), and Saturday — Shanivar — is his day. Black sesame, black cloth, iron, and mustard or sesame oil all fall in that group. Devotees pour mustard oil over the Shani idol or light a mustard-oil diya seeking relief from the hardships linked with Shani's influence, such as the periods known as Sade Sati and Dhaiya. This is devotional belief and custom, not a claim of guaranteed outcome.

On Shanivar, in many homes, the mustard-oil lamp is how the prayer is spoken.

Which oil for Shani Dev, then? Both mustard (sarson) oil and til (sesame) oil are traditional, and either is considered acceptable; mustard oil is the more common choice in the North, sesame oil in many other regions. A popular story tells that Hanuman once freed Shani from captivity, and a grateful Shani promised to spare Hanuman's devotees his harshest effects — one reason the two are worshipped with oil on the same days.

Which oil is offered to Lord Hanuman?

Lord Hanuman is traditionally offered oil in two ways. Chameli (jasmine) oil mixed with sindoor is used to anoint the idol — the signature sindoor chola — while a diya of mustard (sarson) or til (sesame) oil is lit before him, most often on Tuesdays, his day, and on Saturdays. So a mustard-oil lamp for Hanuman is very much part of the custom, sitting alongside the jasmine-oil-and-sindoor offering.

Because Hanuman is believed to shield his devotees from Shani's difficulties, lighting his lamp with the same oil offered to Shani ties the two Saturday customs together in many households.

Mustard oil diya benefits, and how to light one

A mustard-oil diya (sarson ke tel ka diya) is valued in tradition for pleasing Shani and Hanuman and, in folk belief, for clearing negative or heavy energy from a room. On a practical level it burns with a steady, bright flame and is easy to source and afford — a good part of why it became the everyday lamp oil. In the kitchen the same oil is prized for its high smoke point, around 250°C, though that property matters more at the kadhai than at the mandir. The spiritual benefits below are matters of faith, passed down rather than measured.

• Traditionally believed to please Shani Dev, especially on Saturday
• Lit for Hanuman on Tuesdays and Saturdays for his blessings
• In folk belief, said to remove buri nazar and heavy energy from a home
• Practically, it burns with a steady, long-lasting flame
• Widely available and inexpensive, which suits daily lamp-lighting

Lighting a mustard oil lamp

Use a clean clay or metal diya, a cotton wick (batti), and fill it with mustard oil. Light it during evening aarti or at sunset; on Saturdays place it before Shani Dev, at a Shani mandir, or under a peepal tree, and for Hanuman light it on Tuesday or Saturday. Keep the lamp on a stable plate, away from children, curtains and anything that can catch fire, and light it in a ventilated spot. A pure, cold-pressed mustard oil with its natural golden colour and pungency is what most families prefer for the mandir over a pale, refined oil.

Can you buy mustard oil on Saturday or Tuesday?

Yes, you can buy mustard oil on any day, Saturday and Tuesday included. There is a popular North Indian belief that oil, salt and iron should not be purchased on a Saturday because they are linked to Shani, and some families avoid buying oil that day. Yet other households buy mustard oil precisely on Saturday so they can offer it to Shani Dev. These are regional customs, differing from home to home and plainly contradicting each other — not a binding religious rule.

In practice: if your family follows the no-oil-on-Saturday custom, buy it on Friday or keep a bottle ready in advance. If you are buying it to offer to Shani, Saturday is in fact the traditional day for that. Tuesday (Mangalwar) is Hanuman's day and carries no special restriction on buying oil at all. Do what your elders and community follow; there is no universal ban to worry about.

Donating mustard oil on Saturday

Donating (daan) mustard oil on Saturday is a common Shani-related practice. Many devotees give mustard or sesame oil, black til, black gram, black cloth or iron items to those in need or at a Shani temple on Shanivar, in the belief that it lessens the difficulties associated with Shani. The tradition emphasises a simple, sincere daan offered without ego; the spirit of the charity is held to matter more than the quantity.

Can mustard oil be eaten during Navratri or a fast?

Traditionally, no. Most observant families avoid mustard oil, and other regular seed oils, during Navratri and other Hindu fasts, cooking vrat food in ghee or peanut (moongphali) oil instead, with sendha namak and fasting ingredients like kuttu, singhara and sabudana. Mustard oil, mustard seeds and regular grains are usually set aside during a strict vrat. That said, fasting rules vary widely by community, with some far stricter than others.

So if you keep a strict Navratri fast, reach for ghee or peanut oil; on non-fasting days, mustard oil goes right back to being the everyday oil in the kadhai. This is a matter of custom and observance, best judged by what your own family and community practise.

A note on all of the above: these customs come from living Hindu tradition and vary by region, sampradaya and family, so treat them as culture rather than commandment. Mustard oil itself is an everyday, food-grade edible oil in India — permitted and regulated by the FSSAI. This article is general information about tradition and cooking, not religious, medical or dietary advice; for specific health or fasting concerns, please speak with a qualified doctor or dietitian.

For the everyday cooking uses of the same oil you keep for the diya — and to bring home a pure kachi ghani bottle for the mandir and the kadhai alike — read on.