Part of the marketing of 5w-XX and 0w-XX synthetics is for easier winter starts and less warm up time (and subsequently less fuel consumption) in fleet use, along with other benefits such as extended OCIs.
When certain jurisdictions in Canada are trying to limit power unit idling, you can be darned sure that some fleets will be switching to synthetic.
When certain jurisdictions in Canada are trying to limit power unit idling, you can be darned sure that some fleets will be switching to synthetic.