Front Brakes Hardly Working

RedFish said

There are little details like this one that mfgrs are not going to tell you.
On newer cars... The fluid has changed some but the heat, rubber parts, and metals that contaminate that fluid remains.
The big difference is pushing that fluid back into a antilock brake valve assembly and subsequent cost to replace if and when.

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Exactly, The brake fluid at the calipers and wheel cylinders are subjected to constant heat cycles because of the friction developed by applying the brakes.
On any car it is a good idea to open the bleeder when your compressing the piston to get rid of this fluid. More so when your dealing with Anti lock brake systems. Why risk it? Open those bleeders!