Which compact track loaders are known for low-emission operation and easy servicing?

A few compact track loaders are especially known for low-emission operation and easy maintenance/service access:

• Bobcat compact track loaders – Many models use efficient diesel engines that meet emissions standards, and Bobcat is known for straightforward daily service access.
• Caterpillar (Cat) compact track loaders – Designed with emission-compliant engines and good access to routine service points.
• Kubota compact track loaders – Often praised for fuel efficiency, low emissions, and simple maintenance layouts.
• John Deere compact track loaders – Modern Tier 4 Final engines and service-friendly designs make them a common choice.
• Takeuchi compact track loaders – Known for efficient operation and relatively easy upkeep.
• ASV compact track loaders – Many models emphasize efficient powertrains and accessible service components.

If you want, I can also narrow this down by:

1. best overall low-emission models,
2. easiest to service, or
3. best for rental/fleet use.