Rich H 4 Posted October 1, 2011 Report Share Posted October 1, 2011 (edited) Morning all, I'm about to replace the gearbox oil again following my unsticking of the synchro to make sure any contaminants are caught, but I've been looking at Opie Oils and noticed that TAF-X is no longer listed and the replacement has this statement: Please Note: Castrol Syntrans Transaxle 75W-90 does not meet specification API GL-5. Castrol TAF-X 75w-90 met API GL-5, therefore Castrol Syntrans Transaxle is NOT a direct replacement. If you are unsure if this new product meets you requirements consult your handbook or contact our team. From here: http://www.opieoils....sion-fluid.aspx Any thoughts? Clearly I can still get TAF-X from elsewhere for now... Edited October 1, 2011 by Rich H Quote Lotus Esprit S4 - Work in progress Porsche 924 Turbo - Parts chaser Smart Roadster Coupe - Hers Link to post Share on other sites
ramjet 1,068 Posted October 1, 2011 Report Share Posted October 1, 2011 The last time I asked about this Bibs told me he could sell me some. I presume from the shop right here on the forum. Um nope. Just went and looked and Bibs only has the Castrol Syntrans oil you mention above now as well. I'm sure Bibs will say something sometime. Quote All we know is that when they stop making this, we will be properly, properly sad.Jeremy Clarkson on the Esprit. Opinions are like armpits. Everyone has them, some just stink more than others. Link to post Share on other sites
rogerch 63 Posted October 1, 2011 Report Share Posted October 1, 2011 http://www.lotusespritworld.com/EGuides/ETechnical/oil.html I guess you've seen this, but if not,,,,,,,,,,,,,, I'm using Castrol Syntrax 75W/90 Quote Life is like a sewer, what you get out of it, depends on what you put into it. (Tom Leahrer) Link to post Share on other sites
Rich H 4 Posted October 2, 2011 Author Report Share Posted October 2, 2011 But Syntrax is not GL5 approved, it is GL4. TAF-X is the recommended oil but Syntrax is not.... Quote Lotus Esprit S4 - Work in progress Porsche 924 Turbo - Parts chaser Smart Roadster Coupe - Hers Link to post Share on other sites
rogerch 63 Posted October 2, 2011 Report Share Posted October 2, 2011 Cut and pasted from LEWCapacity: 3.0 litreThe introduction of the Renault Transmission on the Esprit to replace the Citroen Transaxle (Type C35) was a major exercise. The project started using the Renault specified Elf TRX lubricant. Following some durability testing it was found that this lubricant was not suitable for the Esprit application. Following discussions between Renault Engineering and Lotus it was decided to revise the lubrication to a specification that Renault were evaluating.This product was produced by Mobil and was designated as Mobil 630M. The gearbox testing (including things like cold shift quality and operating temperature control) continued using Mobil 630M. The vehicle testing was to a programme that met both Renault & Lotus durability requirements using both test circuits (Nardo & Millbrook) and European Roads (Mainly Germany & Switzerland).Many Vehicles & Gearboxes were subjected to the durability cycle and complete Gearbox strip & inspection was carried out by both Renault & Lotus Engineers.Only after the Renault identified durability had been completed was the Gearbox approval given provided that the Gearboxes were filled with Mobil 630M. At this time the Gearbox was identified as the Renault UN1 - 16. The Mobil lubricant was specified for a number of years until we were advised that it was being phased out and would eventually disappear from the market place. Some Mobil 630 lubricants still exist but unless it is identified as 630M it is different to that approved by Lotus.During the life of the Esprit the vehicle specification was updated several times. This led to changes to the Transmission (to cope with the increased Engine Torque) developed by Renault for the Esprit application (High Torque known as UN1 - 026). During the development of the High Torque Transmission different lubricants were tested to ensure reliability with the increased vehicle performance. The most successful lubricant for all round performance and durability was found to be Castrol TAF - X. This lubricant was specified for all Lotus Esprit Renault Transmission applicationsMany lubricants may offer benefits of some sort (shift quality, cold operation, noise etc.) but the Castrol has been extensively tested by Lotus and found to be our preferred lubricant. All the comments on the net about Lotus making the lubricant choice on things like cost, company connections etc. are incorrect. The lubricant specification was made on Technical Merit only. The Castrol TAF - X met all of our requirements for our increased engine performance (including the V 8).The Gearbox identification is currently Renault UN1 - 027 for the Esprit V8 and Renault UN1- 028 for the Esprit GT3. Castrol TAF - X is available from Lotus under the Part No. A082F6552S. This statement reinforces the words of Dave Simkin of Lotus Cars USA following an enquiry on lubrication specification.Lotus Cars Ltd Quote Life is like a sewer, what you get out of it, depends on what you put into it. (Tom Leahrer) Link to post Share on other sites
ramjet 1,068 Posted October 3, 2011 Report Share Posted October 3, 2011 Not sure what you're saying Roger. You're using Syntrans, but are you backing that up with an article that states that you should be using TAF-X? Quote All we know is that when they stop making this, we will be properly, properly sad.Jeremy Clarkson on the Esprit. Opinions are like armpits. Everyone has them, some just stink more than others. Link to post Share on other sites
rogerch 63 Posted October 3, 2011 Report Share Posted October 3, 2011 http://www.castrol.com/castrol/multipleproductsection.do?categoryId=8000016&contentId=7000384 I run Castrol Syntrax 75W/90, and have done for 4 years, and the car gets driven, hard. I do have to wait for the gearbox to get up to temprature before I can do clutch-less gear changes, but that is not unexpected. Quote Life is like a sewer, what you get out of it, depends on what you put into it. (Tom Leahrer) Link to post Share on other sites
Iconic Ride 267 Posted October 3, 2011 Report Share Posted October 3, 2011 One of the first things I did after purchasing my Esprit was to stock up on the TAF-X (ordered [for a pretty penny] from overseas, as it's not available here in the states), and I guard my supply like the King's gold. While any good quality gear lube ought to be "adequate" for a time, only the TAF-X has the official Lotus "seal of approval" for overall long term wear issues. Obviously they can't have tested every single product on the planet, but the TAF-X is a "known quantity" and thus provides me with peace of mind. Quote Being second is to be the first of the ones who lose. Link to post Share on other sites
Rich H 4 Posted October 3, 2011 Author Report Share Posted October 3, 2011 My problem is that the TAF-X is approved but no longer available, I would like to know I'm not storing up problems. I also know that some gearbox oils attack bronze resulting in long term damage to the box, what if that takes 5 years? Is there an e-mail address for the factory? I can't phone them from here. Quote Lotus Esprit S4 - Work in progress Porsche 924 Turbo - Parts chaser Smart Roadster Coupe - Hers Link to post Share on other sites
sailorbob 259 Posted October 3, 2011 Report Share Posted October 3, 2011 TAF-X is still listed on the Castrol website, it's under the 'classic oils' section. Quote Link to post Share on other sites
Rich H 4 Posted October 3, 2011 Author Report Share Posted October 3, 2011 OK ta, will have a look. Quote Lotus Esprit S4 - Work in progress Porsche 924 Turbo - Parts chaser Smart Roadster Coupe - Hers Link to post Share on other sites
dodge1979 36 Posted October 6, 2011 Report Share Posted October 6, 2011 Im using the syntrax which is gl4 spec. The taf-x I couldnt get a hold of, and I went to the castrol supplier we use for our trucks. Theyre called race lubricants, which is a part of the castrol retail group.i never drive my esprit cold, although the gearbox will obviouslt be cold even wheb the engine is up to temp initially. I get no issues with gear selection. It would be nice to compare though from a driving point of view the difference between the two fluids..if any noticable difference is present. The syntrax was the fluid recomended by race technical as the closest to the taf-x you could get. There are other gl5 spec fluids out there, but that doesnt mean theyre as goodOh, additionally when I was looking earlier in the year there was some places on ebay with some stock...worth another look Quote Link to post Share on other sites
Bibs 10,679 Posted October 6, 2011 Report Share Posted October 6, 2011 I can supply TAF-X still but you'll need to buy it a dozen bottles at a time at around £15/l or I'll stock up if there's expected sales, I've not room to hold lots of stock of anything. Lotus are testing the Syntrans currently. It's 99.9% the same as TAF-X so will probably become the factory recommendation but watch this space for official confirmation. Quote 88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport Evora NA For forum issues, please contact the Moderators. I will aim to respond to emails/PM's Mon-Fri 9-6 GMT. Link to post Share on other sites
sailorbob 259 Posted October 6, 2011 Report Share Posted October 6, 2011 TAF-X is still available directly from Castrol, mail order only. Their telephone sales number is 01954 231668 (9am until 5pm Mon to Fri). Quote Link to post Share on other sites
Rich H 4 Posted October 6, 2011 Author Report Share Posted October 6, 2011 I fully expect that the syntrans will be approved but it is different to TAF-X Fortunately I found 3 litres int he shed so should be OK for now (Also my recent foray into the gearbox and subsequent seal changes means it's topped leaking!) Quote Lotus Esprit S4 - Work in progress Porsche 924 Turbo - Parts chaser Smart Roadster Coupe - Hers Link to post Share on other sites
CHANGES 1,053 Posted October 6, 2011 Report Share Posted October 6, 2011 I always carry 16 -20 litres of TAF-X on the shelf as its the sort of stuff you can't always get just when you need it. If anyone is really stuck for the odd litre or two pm me and i will try and help you out. Dave Quote Link to post Share on other sites
philip600 15 Posted January 8, 2012 Report Share Posted January 8, 2012 I can supply TAF-X still but you'll need to buy it a dozen bottles at a time at around £15/l or I'll stock up if there's expected sales, I've not room to hold lots of stock of anything. Lotus are testing the Syntrans currently. It's 99.9% the same as TAF-X so will probably become the factory recommendation but watch this space for official confirmation. Hi, anymore news on this ? I wanted to get some to top up my gearbox but as has been said Opie oils state Syntrans is not GL-5 so is not same spec as Lotus recommend. The do however list a Millers oil which does meet GL-5 & I can pick this up from my local motor factors ? Regards, Phil. Regards, Phil. Quote Link to post Share on other sites
sailorbob 259 Posted January 8, 2012 Report Share Posted January 8, 2012 TAF-X is still available directly from Castrol, mail order only. Their telephone sales number is 01954 231668 (9am until 5pm Mon to Fri). Quote Link to post Share on other sites
philip600 15 Posted January 9, 2012 Report Share Posted January 9, 2012 Hi Derek, Thanks, I saw your post but wondered what peoples thoughts on the Millers oil that Opie Oils list for the Esprit ? It's 75w/90 but meets GL-5 so it it's the same spec as TAF-X where Syntax is only GL-4. I can get Millers from local motor factors whereas I'd need to order Castrol & pay for delivery ? Anyone used Millers ? Phil. P.S. This is also only for topping up if needed. Quote Link to post Share on other sites
sailorbob 259 Posted January 9, 2012 Report Share Posted January 9, 2012 The TAF-X meets GL4 and GL5 which is what the gearbox needs. Most oils will only meet one GL spec. Quote Link to post Share on other sites
philip600 15 Posted January 9, 2012 Report Share Posted January 9, 2012 Hi, Just picked up some Millers TRX 75w/90. It's fully synthetic & states on the bottle it meets GL4 & GL5 so it would appear to be the same spec as TAF-X or am I missing something ? Phil Quote Link to post Share on other sites
Iconic Ride 267 Posted January 9, 2012 Report Share Posted January 9, 2012 That's all well and good, Phil. But how does it taste on cereal? Quote Being second is to be the first of the ones who lose. Link to post Share on other sites
philip600 15 Posted January 9, 2012 Report Share Posted January 9, 2012 I'll let you know in the morning, although it is a bit dearer than milk so it may not be a good sustitute Phil. Quote Link to post Share on other sites
sailorbob 259 Posted January 9, 2012 Report Share Posted January 9, 2012 (edited) Millers TRX 75W-90 is semi-synthetic whilst the TAF-X is fully synthetic. There is a fully synthetic version of theTRX. The two TRX oils have a much lower viscosity index than the TAF-X which means they are not as capable of maintaining their viscosity over a range of temperatures. Edited January 9, 2012 by sailorbob Quote Link to post Share on other sites
Rich H 4 Posted January 9, 2012 Author Report Share Posted January 9, 2012 TAF-X is 75W90 TRX is 75W90 How is that thinner? Quote Lotus Esprit S4 - Work in progress Porsche 924 Turbo - Parts chaser Smart Roadster Coupe - Hers Link to post Share on other sites
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