Motorbreath Strain Review: Chemdog Meets SFV OG Magic

The Motorbreath strain crosses Chemdog with SFV OG, two pillars of gas-forward cannabis, and the aroma lives up to the name.

I’m James Bean, founder of Seeds Here Now since 2010. This review covers Motorbreath’s lineage, aroma, look and reported potency, plus related gas strains.

Seeds Here Now sells authentic breeder packs to adults 21+ as souvenirs and collectibles. We do not provide growing instructions, and nothing here is a medical claim.

Motorbreath at a Glance

Lab figures vary by sample, so treat THC numbers as reported ranges, not guarantees. We describe lineage, aroma and appearance only; we make no claims about effects.

Motorbreath Genetics and History

Motorbreath crosses Chemdog, the East Coast fuel line behind Sour Diesel and OG Kush lore, with SFV OG, a San Fernando Valley OG Kush cut. Both parents are pillars of gas-forward cannabis.

The name says it all: this is a strain for collectors who love fuel. Leafly’s Chemdawg profile covers that parent.

Motorbreath Aroma and Appearance

The Motorbreath strain smells like its name: heavy diesel with earth, pine and a spicy edge from caryophyllene. It is one of the gassiest lines in our catalog.

Buds are dense and frosty, with the chunky OG structure and a thick resin coat.

Motorbreath vs. Similar Strains

Related: Gator Breath, Onion Motorbreath by Happy Dreams Genetics and SFV OG Kush by Cali Connection.

Collecting Motorbreath

Look for a named breeder, a clear lineage and sealed original packaging when you find a Motorbreath pack. Popular names attract imitations, so buy from accountable sources. Browse our feminized, regular and autoflower seeds for related lines.

Chemdog: The First Parent

Half of the Motorbreath strain comes from Chemdog, one of the most important families in American cannabis. The story most collectors know starts in 1991 at a Grateful Dead show in Deer Creek, Indiana, where, as it is usually told, a bag of very pungent flower changed hands and a few seeds inside it became the start of the Chem family.

Chem genetics are widely credited as part of the story behind both Sour Diesel and OG Kush, which makes Chemdog a grandparent of a huge share of modern gas strains. In the Motorbreath strain, Chemdog is credited with the sharp, chemical fuel and funk. Our guide to CSI Humboldt Chem seeds covers the family in depth, and our Sour Diesel history covers its East Coast side.

The Numbered Chem Cuts

Collectors talk about Chem by number, because the original seeds produced several keeper plants that were shared under different names:

Motorbreath listings usually say only Chemdog, without naming a cut, so treat the exact Chem parent as unknown unless a breeder states it.

SFV OG: The Second Parent

The other half of the Motorbreath strain is SFV OG, short for San Fernando Valley OG. It is one of the best-known OG Kush cuts from Southern California, kept in the San Fernando Valley north of Los Angeles and famous for a sharp pine, lemon and fuel aroma.

SFV OG became a reference cut for the OG family and has been used in many crosses. In Motorbreath, it is credited with the pine and lemon edge, the dense OG structure and the heavy resin. We carry SFV OG Kush feminized from Cali Connection for collectors who want the parent line, and you can browse the full Cali Connection catalog.

The San Fernando Valley OG Scene

The San Fernando Valley, just north of central Los Angeles, became one of the key places where OG Kush was kept and shared in the 1990s and 2000s. Growers there preserved specific cuts and passed them around under local names, which is how SFV OG got its name.

That local tradition matters for collectors. Cut names like SFV OG are a form of provenance: they tell you which branch of a famous family a line came from. When the Motorbreath strain lists SFV OG as a parent, it is pointing to that specific Los Angeles branch rather than to OG Kush in general.

Cali Connection and SFV OG Kush Seeds

Cali Connection is one of the breeders most closely tied to the OG family in seed form. The company, associated with breeder Swerve, released SFV OG Kush and other OG lines as seeds at a time when many OG cuts were available only as clones.

That work made the OG family much easier for collectors to hold in seed form, and Cali Connection’s SFV OG Kush remains a reference pack for anyone building an OG collection alongside the Motorbreath strain.

What OG Kush Is and Why It Matters

OG Kush is the family that defined West Coast cannabis in the 1990s and 2000s. Its exact origin is one of cannabis’s great debates. The most common story ties it to Chem genetics crossed with a Kush line, first in Florida and then in Los Angeles, though the details depend on who is telling it.

What is not debated is its influence. OG Kush cuts like SFV OG, Tahoe OG and others became the backbone of California breeding, and the OG family is a parent of Girl Scout Cookies, which in turn led to most of today’s dessert strains. Our reviews of Legend OG and Bubba Kush cover two more members of the wider Kush family.

For collectors, the OG family is a good reminder that famous cuts were often preserved by small groups of growers long before seed versions existed. Lines like SFV OG survived because people kept them alive, cutting by cutting, and that history is part of what you hold in a pack of OG-family seeds such as Motorbreath seeds.

Why Chem x OG Works

Crossing Chemdog with an OG Kush cut is, in a sense, a family reunion. If the common origin story is right, OG Kush already carries Chem genetics, so pairing the two concentrates the traits they share: fuel, funk and heavy resin.

Each parent still brings something of its own. Chemdog adds a sharper, more chemical edge. SFV OG adds pine, lemon and a denser OG build. The Motorbreath strain is the result: one of the most fuel-forward combinations you can make from two of the most famous gas families.

Motorbreath Compared With Its Relatives

Side by side, the Motorbreath strain sits right between its parents: sharper and more chemical than SFV OG, and earthier and denser than Chemdog.

Why It Is Called Motorbreath

The name describes the aroma. People who know the Motorbreath strain often compare it to an engine bay or a gas station: heavy fuel, a little oil, and something sharp and chemical underneath.

Motorbreath is also the name of a track on Metallica’s 1983 debut album, and some collectors see the strain name as a nod to it. There is no documented link, so treat that as a fun coincidence rather than the breeder’s account.

The Breath Family of Strain Names

Breath shows up in a lot of strain names, and it does not always mean the same thing. Some Breath strains descend from OG Kush Breath, a Cookies-family line. Others, like the Motorbreath strain, use the word simply to describe a heavy, gassy aroma.

As always, read the lineage rather than assuming that two Breath strains are related. Our Gator Breath strain review covers one of the others.

Motorbreath Terpenes

Terpenes are the aroma compounds in cannabis. Reported terpenes for the Motorbreath strain usually include caryophyllene, myrcene and limonene, with pinene in some samples.

The fuel note itself is not fully explained by the main terpenes. Researchers have linked some gassy and skunky cannabis aromas to small amounts of sulfur-containing compounds, which may help explain why Chem and OG lines smell the way they do. Terpene levels vary by sample, and we describe them for aroma only, with no claims about effects. See our guide on what terpenes are.

The Science Behind the Fuel Smell

For years, people assumed that terpenes alone explained cannabis aroma. More recent research has shown that a small group of volatile sulfur compounds also plays a big role, especially in skunky and gassy strains. One of them, often called prenyl thiol, has been identified as a major contributor to the classic skunk smell.

These compounds are present in tiny amounts but have a very strong smell, much like the sulfur compounds in garlic, onion and coffee. That may help explain why Chem and OG lines like the Motorbreath strain smell so much louder than their terpene numbers alone would suggest, and why savory crosses like Onion Motorbreath are possible at all.

This research is still developing, so treat it as a promising explanation rather than settled science.

The Motorbreath Flavor Profile Collectors Describe

• First impression: heavy diesel and chemical fuel from the Chem side.
• Middle: damp earth and a peppery spice.
• Finish: pine and a faint lemon from SFV OG.
• Overall: loud, sharp and savory, with very little sweetness.

That near-absence of sweetness is what sets the Motorbreath strain apart from most modern lines. It is a throwback to the era before dessert genetics took over.

A Glossary of Gas Words

Collectors use a handful of words for fuel-forward strains like Motorbreath, and they are not quite interchangeable:

• Gas: the general term for a fuel-like aroma, the opposite of sweet.
• Diesel: a heavier, oilier fuel note, often linked to the Sour Diesel family.
• Chem: a sharp, solvent-like, chemical smell, named for the Chemdog family.
• Funk: a deep, musky, almost animal note that rounds out gas strains.
• Skunk: the classic sulfurous cannabis smell, linked to volatile sulfur compounds.
• Savory: onion, garlic or spice notes, a newer niche that Motorbreath crosses often chase.

The Motorbreath strain is usually described with the first four of these, which is a good shorthand for how fuel-heavy it is.

What Motorbreath Looks Like

Photos of the Motorbreath strain usually show dense, chunky OG-style buds in deep green, sometimes with darker tones, under a thick coat of frost. Orange and amber pistils run across the surface.

The heavy resin is a trait both parents are known for. Read more about cannabis trichomes, where the aroma compounds are stored.

About Motorbreath THC Numbers

The Motorbreath strain is usually described as high-THC, and lab results from legal markets vary widely by sample. Results depend on the specific plant, how the sample was handled and which lab ran it.

We treat THC figures as reported ranges, not guarantees, and we never promise any result from a pack of seeds. Seeds themselves contain no meaningful THC; the numbers describe flower from mature plants.

Gas Strains Through the Decades

The Motorbreath strain sits in a long tradition of fuel-forward cannabis. In the 1990s, Chemdog and Sour Diesel defined East Coast gas, while OG Kush cuts like SFV OG defined it on the West Coast. Those lines dominated for more than a decade.

In the 2010s, attention shifted to sweet dessert genetics like Girl Scout Cookies, Gelato and Wedding Cake. By the early 2020s, many collectors wanted gas again, and lines that mixed dessert with fuel, such as Permanent Marker, became popular.

Motorbreath is a reminder of where that gas came from. It skips the dessert entirely and goes straight to the two families that made fuel famous. For more gas-forward lines, see Sub Zero and the Petrol Station lineage.

East Coast and West Coast Gas

Gas cannabis grew up in two places at once. On the East Coast, the Chem family and its descendants, especially Sour Diesel, became the defining aroma of the 1990s. On the West Coast, OG Kush cuts in Los Angeles and the San Fernando Valley did the same.

The two traditions shared roots, if the common OG origin story is right, but they developed differently. East Coast gas leaned sour and chemical; West Coast gas leaned piney and earthy. The Motorbreath strain joins them: Chemdog from the East, SFV OG from the West. That coast-to-coast pairing is a big part of its appeal for collectors who follow cannabis history.

Motorbreath Crosses

Breeders have used the Motorbreath strain as a parent when they want to add serious gas to another line. The best-known example in our catalog is Onion Motorbreath from Happy Dreams Genetics, which pushes the profile toward savory, onion-like funk.

Savory and garlic-style aromas have become a niche of their own, and Motorbreath is a natural parent for that work because its profile is already so far from sweet. Each new cross is its own line, so judge it by its breeder and lineage.

Common Myths About the Motorbreath Strain

• Every Breath strain is related. Some descend from OG Kush Breath and some just use the word for a gassy aroma.
• Motorbreath has a known Chem cut. Most listings say only Chemdog, without naming which cut.
• It is named after the Metallica song. Maybe, but there is no documented link.
• Higher THC means a better pack. THC figures describe mature flower, vary widely and say little about seed quality or authenticity.

How to Spot Authentic Motorbreath Seeds

1. Check that the pack names a real breeder and lists Chemdog x SFV OG.
2. Buy sealed, original breeder packaging with no signs of repacking.
3. Be careful with listings that use the name with no breeder or lineage details.
4. Keep the pack and receipt together; provenance is part of the value.

Our guide on how to choose a US cannabis seed bank covers more of what to look for in a seller.

Questions to Ask Before Adding Motorbreath Seeds

1. Who is the breeder, and do they state the Chemdog x SFV OG lineage?
2. Do they say which Chem cut or SFV OG source they used?
3. Is the pack feminized, regular or autoflower, and is that what you want?
4. Is it sealed, original breeder packaging from a seller who can explain where it came from?

Clear answers to all four are a good sign.

Reading a Motorbreath Seed Listing

A good listing for Motorbreath seeds should tell you:

• Breeder: who made the cross, since versions can differ.
• Lineage: Chemdog x SFV OG, and ideally which Chem cut was used.
• Seed type: feminized, regular or autoflower. See our explainer on feminized vs. regular seeds.
• Generation: labels like S1 or F1. See S1, F1 and F2 seeds explained.

If a listing leaves these out, treat it with caution.

Building a Gas Collection Around Motorbreath

The Motorbreath strain makes a strong anchor for a gas-themed collection. Pair it with a Chem line from our CSI Humboldt guide, an OG cut like SFV OG Kush, and a Sour Diesel line to show the three pillars of fuel-forward cannabis side by side.

Then add a modern gas cross like Onion Motorbreath or Permanent Marker to show where the tradition went next. Store every pack sealed, cool, dark and dry, out of reach of children and pets, with a note of the breeder and purchase date.

Three Collection Themes for Motorbreath Seeds

• Family tree: Motorbreath with a Chem line and SFV OG Kush, so all three generations sit together.
• Coast to coast: Motorbreath beside Sour Diesel for the East and an OG cut for the West, showing how the two gas traditions met.
• Savory branch: Motorbreath with Onion Motorbreath and Gator Breath, tracing the newer move toward savory and garlic aromas.

Each theme tells a different story with the same anchor strain, which is part of what makes the Motorbreath strain so useful in a collection.

Collector Notes for Motorbreath Seeds

For each Motorbreath pack, note the breeder, seed type, the lineage exactly as printed, where and when you bought it, and take a photo of the sealed pack.

Those notes make a collection easier to manage and preserve what the breeder claimed. For a strain whose original breeder is not well documented, that record is especially useful.

Why the Motorbreath Strain Still Matters

In a market full of dessert and candy strains, the Motorbreath strain is a reminder of what made cannabis famous in the first place: loud, unmistakable fuel. It joins the two families most responsible for that aroma, Chem and OG, in one line.

For collectors, that makes Motorbreath seeds a living piece of cannabis history and a strong counterweight to the sweet lines in any modern collection.

Seeds, the Law and Our Rules

Cannabis laws differ by state, and federal hemp and seed rules are changing under Section 781. Check the law where you live before you buy anything. Our cannabis seeds by state guide links every state and its official sources, and our explainer on what Section 781 is covers the federal side.

Every buyer must be 21 or older. We sell seeds as souvenirs and collectibles, and we do not give growing instructions.

Frequently Asked Questions

What is the Motorbreath strain?

An indica-leaning hybrid from Chemdog x SFV OG, known for a heavy diesel aroma.

What are Motorbreath’s parents?

Chemdog and SFV OG.

What does Motorbreath smell like?

Diesel, earth and pine with a spicy edge.

Are there Motorbreath crosses?

Yes, including Onion Motorbreath from Happy Dreams Genetics.

Do you give growing advice for Motorbreath?

No. We sell seeds to adults 21+ as souvenirs and collectibles and do not provide growing instructions.

Who bred the Motorbreath strain?

The original breeder is not well documented. Listings agree on the Chemdog x SFV OG lineage, so check the breeder named on each pack.

What is SFV OG?

San Fernando Valley OG, a Southern California OG Kush cut known for pine, lemon and fuel.

Is Motorbreath related to Sour Diesel?

They share Chem genetics. Chem is widely credited as part of the Sour Diesel story, and Chemdog is one of Motorbreath’s parents.

Why does Motorbreath smell like gas?

Both parents come from the most fuel-forward families in cannabis, and researchers have linked gassy aromas to small sulfur-containing compounds as well as terpenes.

Is Motorbreath indica or sativa?

It is usually listed as an indica-leaning hybrid, though we describe lineage and aroma rather than effects.

Can I buy Motorbreath seeds if I am under 21?

No. We sell seeds only to adults 21 and over, as souvenirs and collectibles.

What is prenyl thiol?

A volatile sulfur compound that researchers have linked to the classic skunky cannabis smell. It is present in tiny amounts but has a very strong aroma.

Is Motorbreath an OG Kush strain?

It is half OG through SFV OG, an OG Kush cut, and half Chem through Chemdog.

What is Onion Motorbreath?

A Motorbreath cross from Happy Dreams Genetics with a savory, onion-like gas profile.

Is Motorbreath sweet?

Very little. Collectors describe it as loud, sharp and savory, with fuel, earth, pine and spice.

What is the difference between gas and diesel aromas?

Gas is the general term for fuel-like cannabis; diesel describes a heavier, oilier fuel note often linked to the Sour Diesel family.

Where can I read more about Chem genetics?

Our CSI Humboldt Chem guide and Sour Diesel history cover the Chem family in depth.

What should I pair with Motorbreath seeds in a collection?

A Chem line, SFV OG Kush and Sour Diesel for history, or Onion Motorbreath and Gator Breath for the savory branch.

Is the Motorbreath strain good for an OG Kush collection?

Yes. Through SFV OG it carries one of the best-known Los Angeles OG cuts, which makes it a natural fit beside other OG-family lines.

Does Motorbreath look like an OG?

Yes. Collectors usually describe dense, chunky OG-style buds under heavy frost, a look both parents are known for.

Bottom Line

Motorbreath earns its place with its lineage and a distinctive aroma. For collectors 21+, it is a strong addition to any themed collection.

Last updated October 7, 2026 by James Bean, founder of Seeds Here Now. Nothing here is legal advice. See our disclaimer, terms of use and shipping policy.