Injini za GTL Cummins sizodziwika kokha chifukwa cha kudalirika, kulimba komanso kutsika kwamafuta amafuta, komanso zimakumana ndi mpweya wovuta kwambiri wamagalimoto (US EPA 2010, Euro 4 ndi 5), kutulutsa zida zoyendera mumsewu waukulu (Tier 4 interim/Stage) IIIB) ndi zotulutsa zonyamula sitima (IMO IMO standards) akhala akutsogolera pamsika wampikisano wowopsa.