Which Gearbox Oil

[gordon lonsdale]

MY 2001 TDI 6 SPEED MANUAL IS COMING UP FOR 90,000 MILES NOW AND I'M THINKING OF CHANGING THE GEARBOX OIL (A) ELIMINATE NOTCHY GEARCHANGES , AND ( B) TO LENGTHEN ITS USEFUL LIFE .......WHICH OIL SHOULD I USE , AND SHOULD I CONSIDER AN ADDITIVE ......... 20 OR 30 QUID SPENT NOW MIGHT ENSURE ANOTHER 30/40,000 MILES, OR MORE . ANY OTHER SUGGESTIONS WELCOMED REGARDING THIS OR OTHER PREVENTIVE MAINTAINANCE IDEAS.........THANKS GGORDON