Hey! This one thing has been bugging me quite a bit, literally the lack of Oil choice in engine design.
As we all know, Oil is pretty important for a engine and it affects how the engine behaves under load. Thus I suggest this:
(Oil, features etc.)
Thick low vasc. oils, great for torque, cheap but creates alot of resistance against Revvin, gives long lifespan to casted engines and doesnt need to be changed often
Medium vasc. oils, a 50/50ish choice, only lubricates the engine, gives a little resistance against revving, small amounts of lifespan added on aluminium engines, needs to be changed every year.
High vasc. oils! Revv that V8, spin that ecobox. This oil can handle it, keeping the CS, coils etc. lubricated for maximal perfomance gains. Damn expensive, but damn worth it. Change interval depends on driving.