Iinjini ze-GTL Cummins azaziwa kuphela ngokuthembeka kwazo kudidi lokuqala, ukuqina kunye noqoqosho lwamafutha, kodwa zikwadibana nokukhutshwa kweemoto eziqatha (i-US EPA 2010, i-Euro 4 kunye ne-5), ukukhutshwa kwezixhobo eziphuma kuhola wendlela (Inqanaba lesi-4 lethutyana/Inqanaba) IIIB) kunye nokukhutshwa kwebhodi yeenqanawa (imigangatho ye-IMO IMO) ibe yinkokeli yoshishino kukhuphiswano oluqatha.