Quote:
Originally Posted by orlo  Hi:
Question for someone that might know? Do the extreme pressure additives (Phosphorous, etc.) they put in gear oil break down over time? I so how long? |
Seeing as your question has not been answered , i'll give you my 2.02c .
Yes they do break down over time , how long i don't know . It depends on many things .
What i do is change my oils twice a year , once in June and once in December . You can't forget this way , June is the end of the finacial year and December is the end of the year . I am a contractor that works the gear hard . You may get away with doing it once a year . Oil and filters are cheap , bearings etc are not . Take the guess work out and have peace of mind .