I am considering Millers synthetic TRX Gear oil for IRD.... hear is some blur below......has anybody used this?????

DESCRIPTION:
A Full synthetic transmission oil to provide maximum protection and fuel economy.

APPLICATION:
For use in car and light van manual gearboxes and axles where the ultimate performance gear oil is required .

USER BENEFITS:
Will allow fuel economy of the vehicle to be maximised.
Provides outstanding protection against wear and corrosion.
Improves the quality of the gear change.
Resists the effects of high temperature and heavy duty use.
Allows extended service intervals to be used.

PERFORMANCE PROFILE:
API GL4,GL5
ZF TE-ML-02
ZF TE-ML-05

TYPICAL CHARACTERISTICS:
SAE 75w90

the trick is to ignore last line changing at least yearly is best safe guard