Moteri ya GTL Cummins ntabwo izwi gusa kubera ubwizerwe bwo mu rwego rwa mbere, igihe kirekire ndetse n’ubukungu bwa lisansi, ariko kandi ihura n’imyuka ihumanya ikirere (US EPA 2010, Euro 4 na 5), ibyuka byangiza moteri bifite moteri (Tier 4 interim / Stage) IIIB) hamwe n’ibyuka byoherezwa mu bwato (IMO IMO ibipimo) byabaye umuyobozi winganda mumarushanwa akaze.