As beneficial as heating the oil is to lubrication at start up some of that heat is lost to coolant via the oil cooler as it will heat the coolant until the temperatures balance. Unless of course you can pre-heat the coolant as well. Coolant is heated by heat that will be rejected anyway once operating temp is reached - albeit at a higher rate. Oil heating via its own fluid friction is at the expense of fuel and is a loss that reduces when operating temperature is reached with minimal rejection of heat to atmosphere. Pre-heating the bulk oil is advantageous though(despite heat loss to coolant) - just a PITA to accomplish.(I'm assuming there is no thermostat in the oil cooler to prevent oil flow through it at what would still be a moderate oil temp when pre-heated).
At least with CDI, you aren't having to run rich as do the petrols.
At least with CDI, you aren't having to run rich as do the petrols.
Comment