HP90 Oil

cowlover, Sep 23, 8:02am
It's oil so must be motoring.
My rotahoe specs a HP90 oil for the gearbox/diff/drive unit.AFAIK its a brass wormdrive system.Is HP90 the same as EP90!If not who makes/sells a HP90!

mrfxit, Sep 23, 8:18am
Basically the same
HP= High pressure
EP= extreme pressure

These days I short cut a few issues by going with a multi grade such as 75/90
Partly depends on usage duration & load ratings

cowlover, Sep 23, 8:21am
Bit more digging (pun intended) and it looks like it wants a API-GL1.Is that as hard to find as I think it might be!

mrfxit, Sep 23, 8:24am
Oil company depot shop.or truck stop might be a better bet then any retail outlet

msigg, Sep 23, 9:36am
just get it from repco/super cheap they will tell you which one.

bwg11, Sep 23, 10:33am
I would have some reservations about using an EP GL5 if there are brass gears. Google "EP oils and Brass" then make your own decision. I would keep looking for a GL1 oil.

supernova2, Sep 23, 10:36am
I see some of the old tractor guys run a 20/50 engine oil instead of GL-1.Lots of old gearboxs used an engine oil.Maybe it would be OK.Some motorbikes use GL-1 so maybe a bike dealer!

luxy, Sep 23, 12:13pm
Be careful. the moderns oils have additives that will react with the brass,,,, use what is specified

beart0y, Sep 23, 3:43pm
Masport have the CORRECT oil for them.