Buy Grassroots | Motorbreath # 15 | Flower (IH). Motorbreath 15 is an indica-dominant hybrid weed strain made from a genetic cross between Chemdog and SFV OG Kush. This strain is 70% indica and 30% sativa. Motorbreath 15 has a rare and exotic lineage, as it is the only strain cultivated by Jimmy Nitz of Pisces Genetics This strain is an ideal choice for experienced cannabis consumers who can handle a potent high. Motorbreath 15 effects include feeling relaxed, happy, and euphoric. Medical marijuana patients often choose Motorbreath 15 when dealing with symptoms associated with stress, insomnia, and pain. Bred by Pisces Genetics, Motorbreath 15 features flavors like diesel, chemical, and pepper. The dominant terpene of this strain is myrcene, which contributes to its sedating and anti-inflammatory properties.