there are several ways to do this...just depends on the amount of money you want to spend

cheap...sythentic gear oil reduces friction slightly and lasts longer under heat abuse...i usually use 80w90 in my pr5 (running turbo though)...use 75w90 in the tsx

~$300...lightweight flywheel reduces loss but at the expense of rotational intertia (easier to stall the car...that is the reason stock flywheels are heavy to keep its momentum better)

~$1000...carbon fiber driveshafts (common for rwd and awd cars now) and lighter axles (have to do some research)

extreme $$...lighter and stronger drivetrain components...ala F1 (titanium & carbon fiber gears! and input shaft!)