A power company I did contract hydraulic repair and machining for ran their whole fleet on delo 15w-40 from their boom trucks, telehandlers, excavators, cranes, fork lifts, generators and other equipment to the smaller f150's, rangers, and many ford fusions and escapes and some other random vehicles. The employees would suck down the bulk tank for themselves when no one was looking. Many of the fords were ecoboost and they never had an oil related failure but delo isn't calcium heavy.
There's no reason to fear CK4 when it's dual rated. Even though SN can be high calcium since SN+ was there lspi became a concern I've never seen an SN hdeo be calcium rich or have a saps above 1.0%