Hi everybody: I have to change the gear oil in the front axle of my
L3830 and in the drive gear of the KX 71-3 excavator I have. The problem is I do not know where to buy it because every shop I went seems to have only store brand (Napa, Wall Mart etc) which I'm not sure I trust. Any recommendations? What everybody uses? Another small question: is Rotella T triple protection engine oil, which is rated CJ-4, good for the machines I have which are not tier 4 (low emissions). In other words is this oil usable in tier 3 older engines? Thanks.