Thread: Nulon 75W-90 full synthetic gear oil.

Originally Posted by rick130

Either a motorbike store or contact the importer for a dealer

What about motul motylgear 75/80w for gearbox and transcase??

Originally Posted by 4runnernomore

After a lot of research my mechanic (landrover D2 TD5 owner as well) decided on running Penrite Progear 70W-75 full synthetic in the gearbox for the quality shifting and resistance to shearing in the heat.

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The R380 box is extremely sensitive to the oil... i've changed 3 types of "alternative" oils in mine in less than a month cos the geashift was sh*t especially from cold then i bit the bullet and bought the genuine MTF94 / STC9158 which made the box to work as a new one... use only that oil in the gearbox and you'll not regret it.

Originally Posted by sierrafery

The R380 box is extremely sensitive to the oil... i've changed 3 types of "alternative" oils in mine in less than a month cos the geashift was sh*t especially from cold then i bit the bullet and bought the genuine MTF94 / STC9158 which made the box to work as a new one... use only that oil in the gearbox and you'll not regret it.

If you have changed them in under a month then you haven’t given the additive package time to do what it needs to do IMHO

I dont think so cos after i filled it with MTF94 it changed gears like a dream on the first drive

Originally Posted by sierrafery

I dont think so cos after i filled it with MTF94 it changed gears like a dream on the first drive

it's been my experience over many years.

but would be a dull world if everything was predictable...

I dont contest your experience but i was too fed up with that hard gear change to wait untill eventually some additive pack kicks in(i didnt even know that), maybe the fact that it's very cold here in winter (below -20*C) had some effect as well cos to select 1'st and 2'nd gear untill it warmed up was a real nightmare, the oils i've tried were as follows in this order: Castrol Syntrans 75W85(this was the worst), Mobil Delvac XTP 75W80, Red Line 75W80 mtf, all recommended by different oil dealers as being the suitable alternative for STC9158 which was not on anyone's stock, the last Red Line was the best of them but still not enough to please me as the genuine stuff did.... i'm sure now that i'll not put anything else than STC9158 in my gearbox.

Originally Posted by sierrafery

maybe the fact that it's very cold here in winter (below -20*C) had some effect as well cos to select 1'st and 2'nd gear untill it warmed up was a real nightmare, the oils i've tried were as follows in this order:

thats exactly the reason the others are slow until warmed up...

in my neck of the woods your trying to cover your butt in the the hottest temps as it is very rarely below 0*C but can be above +40*C ambient and thats where MTF and ATF etc arent too flash and you hear your box rattling etc etc.

LR specs in the user manual reckon ATF is good from -50*C to +50*C which is why they specified it i imagine and went to MTF94 when there were failures etc as MTF had a better additive package.

any comparison should be relative to your environment and people should probably state that when discussing this subject