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Discussion Starter · #1 ·
Hi,

Just picked up a cup car and I've got the plate diff. Not familiar with the transmission layout for the Toyota power train yet. Does the diff use oil from the gearbox (transaxel configuration) or do you need to fill the diff separately? I've had very good luck with Mobil 1 75-90 gear oil in other transaxel boxes with plate diffs so I would like to use it in my cup car. However, Mobil 1 gear oil does not like yellow metals. Does the Toyota gearbox have any yellow metals in it?

Thanks,
Matt
 

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I don't own a cup car (unfortunately) but I believe it is the same transmission as every other lotus, so do the MT-90 and be done w/ it.
 

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I saw the Mobil 1 - 75W/90 in my local parts store. It is API GL-5 which is recommend by Lotus. Why so many adamant about Redline MT-90 or Motul given Havoline Multigear S is the Lotus recommended brand...?

Havoline superseded by:

 

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For the record, I've only used MT-90 75W/90 & Mobil-1 5W/40 and have exceeded 150k miles with no issues. Just curious...
 

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Just noticed on the MWR site that they recommend using only Valvoline Synchromesh for a NA street driven car or a custom blend with MT-90 for varying degrees of track use... Can anyone opine on using only the Synchromesh?
 

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Amsoil has this:

Amsoil 75W-90.jpg


Everyone is still using MT-90???
 

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The best transmission lube I’ve found is Redline MT-90 plus a little Power Punch Extreme Gear Oil Additive. (Note that it takes two changes to get rid of the previous lube.)
 

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2010 Exige S260
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I am also an MT-90 user, with LSD and no LSD
 

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2005 Elise LSS Saffron Yellow
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My understanding is that a decade or so ago people here (EliseTalk at the time) experimented with a lot of different trans lube choices and decided on the MT-90 or MT-90 + an additive gave better shifting (synchro function) than any of the other options.

Senior members, please correct me as needed - I haven't read all of those fine, vintage threads.

My ancient '92 Celica uses the same synchro layout in it's C56 transmission, so will probably swap this in as it's due for a fluid change. I think my Elise already has MT-90 as it shifts very well.
 

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Another plus for MT-90!
 
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