Carbon buildup is more common in direct-injection engines than in port-injected engines ... the change of carbon buildup. Changing your car's spark plugs at their recommended interval also plays ...

However, these benefits come with a notable trade-off: GDI engines are more prone to carbon buildup. EFI and carbureted engines are subject to buildup, as well, but there's an increase in modern ...

Toyota Motor Corp. isn't slowing down in its push to help achieve a carbon-free society ... It will enter a race car based on its Corolla Sport equipped with a hydrogen engine.