TomE 230 Posted April 27, 2014 Report Share Posted April 27, 2014 I've heard some have changed the standard gearbox oil for an alternative one to improve the gear change - anyone know what to use, as the factory only recommend the one. The cables on my Evora have been replaced and carefully adjusted but I still have the odd sticky change from 3rd to 2nd and on fast up changes. I replaced the oil on my Elise and it gave a decent improvement on a previously sticky 3rd to 2nd change so thought I'd give it a try. It's a March 2011 manual S. Quote Link to post Share on other sites
rasasoufe 5 Posted April 27, 2014 Report Share Posted April 27, 2014 (edited) You can use motul gear 300 75W90. That is a fully synthetic gear oil. In my cup260 I used Motul gear 300 75W140 that is even more stable at high temperatures. I'm sure you can use that too. Or Redline 75W90. That is also often used in the 4 cylinder exiges wich often have gearbox problems at higher hp levels. For my exige v6 I also have planned to change the gearbox oil to the motul 75W140. Edited April 27, 2014 by rasasoufe Quote Link to post Share on other sites
TomE 230 Posted June 8, 2014 Author Report Share Posted June 8, 2014 I took some advice from Opie Oils on this. They recommended a fully synthetic 75W80 but not the basic Motul Motylgear - either a Red Line, Amsoil or Fuchs oil. In view of my sticky 3rd to 2nd change and occasional track use they recommended the Red Line one. It's Red Line Synthetic Manual Transmission Lubricant MTL 75W-80 GL4 http://www.opieoils.co.uk/p-1019-red-line-synthetic-manual-transmission-lubricant-mtl-75w-80-gl4.aspx. I had this done last week and there's been a slight but noticeable difference in the gear change, particularly in the 3rd to 2nd down shift. I'll see how it feels over my several hundred mile trip to, around and from the Isle of Man at the end of the month. Interestingly the old gearbox oil was very discoloured and dirty. The car is just over 3 years old and has done about 14,000 miles including 6 track days. Despite the service schedule saying to change it every 4 years, Back On Track are now recommending I change it more frequently, probably every 12-24 months. Opie are aware of at least one Evora owner using the Motul Gear 300 75W90 and although this is a good oil in their opinion, they don't know why they used 75W90 rather than 75W80. 1 Quote Link to post Share on other sites
Gold FFM Colin P 644 Posted June 8, 2014 Gold FFM Report Share Posted June 8, 2014 Tom, have you noticed your gear change being better or worse in the summer. Even when warm? Quote A Lotus is for driving, pork is for breakfast. Link to post Share on other sites
DJW 677 Posted June 8, 2014 Report Share Posted June 8, 2014 Watching this thread with interest, as changed from standard gearbox and diff oil on a previous caterham, with improved gear change and less transmission noise. Quote Previously owned :Exige 380, Exige 350, Evora 400, Exige V6S, Esprit GT3, 2-11 SC, Evora S, Elite 501 Link to post Share on other sites
TomE 230 Posted June 10, 2014 Author Report Share Posted June 10, 2014 Colin, I hadn't noticed any difference due to ambient temperature. It used to be stiffer just after starting up until the oil had come up to temperature but it isn't such a big difference with the new oil. Quote Link to post Share on other sites
Gold FFM Colin P 644 Posted June 11, 2014 Gold FFM Report Share Posted June 11, 2014 Thanks tom. My change is a little bit stiff when car is cold in the winter, but ok in summer. It's due a gearbox oil change next service so might get Jez to switch the oil at that time. Quote A Lotus is for driving, pork is for breakfast. Link to post Share on other sites
MHC 6 Posted October 1, 2014 Report Share Posted October 1, 2014 Just had Steve Williams replace my gearbox oil with Red Line MTL 75W80 after about 3.5 years and 16,000 miles. Most obvious difference is the gearbox is much quieter at lower revs. Gear change feels smoother (already had the new cables fitted and lots of adjustments made), but acid test will be when the outside temperature drops. I think the oil Lotus recommend is mainly aimed at commercial trucks to reduce oil change intervals and improve fuel efficiency. May be a perfectly good gearbox oil, but I suspect Lotus chose it as much to provide a solid back up to the three year warranty as anything else. Either way, I would suggest changing the oil more frequently than every four years. The gearbox is probably the weakest link so a bit of TLC should pay off. Quote Link to post Share on other sites
Neil Schwartz 0 Posted February 19, 2019 Report Share Posted February 19, 2019 Want to change gearbox oil, in my 2011 NA, to Redline MTL 75W80. Can someone tell me how much oil to buy (1 quart; 2 quartz)? Thanks! Quote Link to post Share on other sites
Ledlights 57 Posted February 20, 2019 Report Share Posted February 20, 2019 This was covered a page back, here’s the link: Quote Link to post Share on other sites
Bruss 578 Posted February 20, 2019 Report Share Posted February 20, 2019 Redline MTL 75w80 from Car Service Packs. https://www.carservicepacks.co.uk/ Ask nicely they might give you a discount because it's a Lotus. (I did). 2 quarts might do it but I got 3. Quote Link to post Share on other sites
Don262 10 Posted February 20, 2019 Report Share Posted February 20, 2019 I got 3 quarts and they cost £60.98 delivered from (JJC) Race and Rally on ebay . 2 quarts isn't enough. Quote Link to post Share on other sites
Counterdoc 53 Posted August 20, 2020 Report Share Posted August 20, 2020 Old topic but maybe this one would also be a good alternative: Redline MT-85 75W85 https://www.redlineoil.com/mt-85-75w85-gl-4-gear-oil Quote Link to post Share on other sites
Maxi_z 106 Posted August 26, 2020 Report Share Posted August 26, 2020 I use Redline MT 90 on my exige 380 cup and it s much better Those oils are specifically formulated to make synchronizers work better and that s what s effective in that kind of gearbox Frome Redline you can choose between MTL MT 85 or MT 90 depending on the use ( street or track ) and the outside temperatures This gearbox was not really intended for a sport car use so it s difficult to know what will be better for track use I still noticed after using the Redline MT 90 that after many aggressive laps on track it so at higher temperatures it once slightly crunched when shifting to 4th gear After that I replaced the complete clutch ( and brake ) fluid with castrol srf and it didn t make it again so it s really good to replace the clutch fluid with something better for track use Motul gear 300 is also a really good and recommended oil I never used something as 75w140 and would like to know if it s better for track use and still ok for the synchronizer 1 Quote Link to post Share on other sites
Counterdoc 53 Posted August 26, 2020 Report Share Posted August 26, 2020 (edited) There are some Nissan 350Z and 370Z (they also have some gearbox issues) drivers that are mixing MT90 and Redline Lightweight Shockproof 1:1 (https://www.redlineoil.com/lightweight-shockproof) and are pretty happy with it. Maybe this is worth a try. Edited August 26, 2020 by Counterdoc Quote Link to post Share on other sites
#84 17 Posted August 31, 2020 Report Share Posted August 31, 2020 Interesting with the Redline Shockproof. I went a similar, but different, route using the Mobil Mobilube 1 SHC 75W-90 with Lindemann TA transmission additive. http://www.lindemann.dk/industrial-products/ta-manual-gearbox-differential-treatment-with-teflon/ It is frequently used in motorsport by people around here and the difference in transmission losses can clearly be seen on the dyno. Anyhow, I experienced the well documented loss of synchromesh functionality on trackdays with the standard gearbox oil, especially going to 3:rd, but so far I haven't experienced any tendencies yet after the oil change. 1 Quote Link to post Share on other sites
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