I think it's somewhat circular.
Long OCIs, less oil sales, high fuel costs, expensive oil doesn't look so bad.
My brother's company expressly moved their utility vehicles to Mitsubishi, when Mitsubishi moved to 15,000km service intervals (Toyota diesels were still 5k).
15,000km servicing meant the vehicles were off the road 2-3 times per year, rather than 6-10 times...any potential reduction in life paled into lost productivity.