Mule Fuel is an indica-dominant hybrid cannabis strain bred from GMO Cookies and Lurch, known for a harsh, gassy diesel aroma and a heavy, sedating high. It was bred by Michigan grower Gromer Juana under his ThugPug Genetics label, using a GMO female and his exclusive Lurch male. Leafly lists it at about 29% THC, and SeedFinder reports up to about 30%.
Mule Fuel Strain at a Glance
| Type | Indica-dominant hybrid (SeedFinder lists about 90% indica) |
|---|---|
| Also known as | Muel Fuel |
| Lineage | GMO Cookies × Lurch |
| Breeder / origin | ThugPug Genetics (Michigan grower Gromer Juana) |
| THC | 29–30% (typical lab range) |
| CBD | Under 1% |
| Dominant terpenes | Myrcene, Terpinolene, Beta-caryophyllene |
| Aroma and flavor | diesel, fuel, earthy, garlic funk, tobacco, chemical, ammonia |
| Reported effects | sleepy, relaxed, euphoric, heavy body |
| Best for | evening use, experienced consumers, unwinding at home |
| Flowering time | About 8–10 weeks |
Where Mule Fuel Comes From
Mule Fuel comes from ThugPug Genetics, the label of Michigan breeder Gromer Juana. SeedFinder’s breeder listing describes a GMO female, the garlicky Chemdawg and GSC cross also called GMO Cookies or Garlic Cookies, pollinated by Lurch, a ThugPug male kept in-house. SeedFinder records Lurch as a pheno out of a GMO and Mendo Montage line, which explains why a few menus list the cross as GMO x Mendo Montage. Leafly gives Lurch and GMO Cookies as the parents.
The seeds were released as regular seed, never feminized, and SeedFinder notes most stock has sold out. Even so, the strain spread widely as clones and now shows up from many growers, including Autumn Brands and Coastal Sun in California and Sugarbud in Canada. Some menus spell it Muel Fuel.
It has built a strong following: Leafly shows a 4.6 rating from more than 100 ratings and calls it a strain for experienced consumers.
Mule Fuel Effects: What It Feels Like
Leafly reviewers most often tag Mule Fuel sleepy, relaxed and euphoric, and dispensary menus describe it as sedating, heavy and calming. The onset is usually a warm, happy head buzz that quickly moves into the body. Within an hour many people are settled on the couch, and at higher doses it can end in sleep.
This is a nighttime strain. At close to 30% THC it hits hard even for regular consumers, so newer users should start with a single small puff and wait. Plan to stay in once it lands.
Mule Fuel Terpenes, Aroma and Flavor
Mule Fuel smells like its name. Leafly’s flavor tags are tobacco, chemical and ammonia, and reviewers describe diesel and earthy notes, with GMO’s savory, garlicky funk underneath. It is not a sweet strain; the smoke is gassy and sharp from inhale to exhale.
Leafly’s terpene data lists myrcene first, followed by terpinolene and caryophyllene, though Leafly’s own description names terpinolene as dominant. Myrcene fits the heavy, earthy body, caryophyllene adds the peppery bite, and terpinolene may contribute a faint herbal lift on top of the fuel.
- Myrcene: earthy, musky and herbal, also found in mango and hops
- Terpinolene: fruity, piney and herbal, common in classic sativas
- Beta-caryophyllene: peppery and spicy, also found in black pepper and cloves
Terpene levels vary from grower to grower and batch to batch, so check the lab label on the package. Learn more in our guide to cannabis terpenes.
Side Effects and How to Use Mule Fuel
Leafly reviewers most often report dry mouth, dizziness and dry eyes. Because it is so potent and sedating, overdoing it can bring heavy couch-lock or grogginess the next morning. Hydrate, keep the first session small and do not drive.
If you are new to Mule Fuel, start with one small inhalation or 2.5 mg in an edible and wait before taking more; see our dosing guide.
Do People Use Mule Fuel for Medical Reasons?
Leafly readers most often say they reached for Mule Fuel during anxiety (39%), stress (26%) and pain (18%), and its heavy, sleepy finish leads many people to use it at bedtime. These are personal reports, not clinical evidence.
These are user reports, not clinical findings. For what research actually supports, see our cannabis health and research section, and talk to your doctor before using cannabis for a health condition.
Growing Mule Fuel
- Flowering: About 8–10 weeks
- Height: Compact, bushy and stocky with moderate stretch
- Environment: Indoor or outdoor; SeedFinder calls it best suited to indoor growing
SeedFinder lists a flowering time of about 60 days in its summary and 8–10 weeks in its cultivation notes, with compact, stocky plants, moderate stretch in bloom and moderate harvests of dense flowers. It was only ever sold as regular seed, and most of it is now sold out, so most growers run it from clones. Those dense buds hold moisture, so outdoor growers in wet Pacific Northwest autumns should keep airflow high and watch for bud rot.
Home-grow rules depend on the state: adults can grow at home in states such as California (six plants per residence), Michigan (12 per residence) and Oregon (four per household), while Washington and Illinois allow home growing only for registered medical patients. Check your state in our cannabis laws by state guide before you plant anything.
Strains Like Mule Fuel
- GMO Cookies: its garlicky, gassy parent
- Chemdawg: the fuel grandparent behind GMO
- Motorbreath: another heavy, gas-forward indica hybrid
- Mendo Breath: a sedating evening hybrid
- Gary Payton: a modern high-THC hybrid with a savory, gassy nose
Browse more indica strains, the full strain directory, or our guide to cannabis strains.
More Indica Strains to Explore
Mystery 98 · Nightshade · Northern Lights · Mr. Tusk · Morris Code · Money Maker · All indica strains
Where to Buy Mule Fuel
Dispensary menus change every week, and Mule Fuel may be sold under its own name, as a cross or as a pre-roll or vape. The fastest way to find it is to check store menus online before you go. In Chicago, browse Chicago dispensaries and check the menus at stores like Market 96 – S Wells Street and Ivy Hall – Damen. In Tacoma, browse Tacoma dispensaries and check the menus at stores like Clear Choice Cannabis Hosmer and Dank’s Warehouse Tacoma. You can also browse licensed dispensaries in every state we cover. Adults 21 and older can buy with a valid photo ID; see cannabis laws by state for purchase limits.
Mule Fuel FAQ
Is Mule Fuel indica or sativa?
It is an indica-dominant hybrid. SeedFinder lists it at about 90% indica.
What is Mule Fuel a cross of?
A GMO Cookies female crossed with Lurch, a ThugPug male. Some menus list it as GMO x Mendo Montage because Lurch came from that line.
Who bred Mule Fuel?
Gromer Juana of ThugPug Genetics in Michigan.
How strong is Mule Fuel?
Very strong. Leafly lists about 29% THC and SeedFinder reports up to about 30%.
Is Mule Fuel good for sleep?
Many users reach for it at night because its effects are heavy and sleepy, especially at higher doses.
For adults 21+ in legal states. Strain information reflects breeder descriptions, lab data and user reports; effects vary by person and batch. Not medical advice.