75w80 vs 75w90

DS197 said:
Looking to change the gearbox oil again and was wondering if I should go for Millers Nanodrive which is 75w90 or Millers TRX 75w80? I'm leaning towards the former and any help/advice would be greatly appreciated.

Millers Nanodrive 75w90: http://www.opieoils.co.uk/p-74217-m...rive-high-performance-synthetic-gear-oil.aspx

Millers TRX 75w80: http://www.opieoils.co.uk/p-77237-m...-80-gl5-fully-synthetic-transmission-oil.aspx
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Don't put gl5 in for a start! Needs gl4. Plenty of good oils. 75w90 Fuchs race synchro has been good for me on track with no gearchange issues ever


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A1axx said:
Don't put gl5 in for a start! Needs gl4. Plenty of good oils. 75w90 Fuchs race synchro has been good for me on track with no gearchange issues ever


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That's excellent, thank you! Out of curiousity why you don't recommend using a GL5 spec gearbox oil?
 
I haven't tried mtl. Assume it's not like smurfs blood, the blue stuff they do. It was a waste of money


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