tonydrover Posted April 1, 2016 Share Posted April 1, 2016 I've searched the forum and can't find a definitive answer to what oil should be in the gearbox/transferbox. Is it EP 90 type oil? Quote Link to comment Share on other sites More sharing options...
Nigelw Posted April 1, 2016 Share Posted April 1, 2016 Yes, series used EP90 everywhere except the engine. Quote Link to comment Share on other sites More sharing options...
neil110 Posted April 12, 2016 Share Posted April 12, 2016 Look out for the latest GL5 spec rather than GL4 apparently GL4 has a detrimental effect on the yellow metals used in gearboxes and front axles. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted April 12, 2016 Share Posted April 12, 2016 I was under the impression the GL5 was the problem one! Quote Link to comment Share on other sites More sharing options...
Anderzander Posted April 12, 2016 Share Posted April 12, 2016 Me too - it's G5 oils that are the problem with yellow metals. Topically it's just being discussed on the series one club forum : http://www.lrsoc.com/forum/index.php?topic=21324 Quote Link to comment Share on other sites More sharing options...
neil110 Posted April 14, 2016 Share Posted April 14, 2016 Millers oil sell both a GL4 and a GL5 which they advertise as being suitable for use with yellow metals http://www.millersoils.co.uk/automotive/classic-gearbox-oil.asp Quote Link to comment Share on other sites More sharing options...
Anderzander Posted April 14, 2016 Share Posted April 14, 2016 Yes - being more specific, I think some GL5 is OK - but all GL4 is ok. I was planning on buying one of the 25l drums from Morris Lubricants. They have free delivery on that volume and it's around £100. Quote Link to comment Share on other sites More sharing options...
Snagger Posted April 14, 2016 Share Posted April 14, 2016 Modern GL5 is ok, it was the early GL5 that was a problem. GL4 is what is specified, but it's harder to find and getting expensive. Quote Link to comment Share on other sites More sharing options...
secondjeremy Posted April 16, 2016 Share Posted April 16, 2016 80/90 GL4 oil is readily available and has the advantage it should be the same viscosity as EP90 when hot but is thinner when cold. This makes gearchanging on a S3 in cold weather much easier. It may also leak better!. Quote Link to comment Share on other sites More sharing options...
Snagger Posted April 16, 2016 Share Posted April 16, 2016 80/90 GL4 oil is readily available and has the advantage it should be the same viscosity as EP90 when hot but is thinner when cold. This makes gearchanging on a S3 in cold weather much easier. It may also leak better!. Yes, but you can get EP80/90, which is better as it still has the sulphur which protects the bearings and gear teeth, unlike 80w90. Quote Link to comment Share on other sites More sharing options...
neil110 Posted May 9, 2016 Share Posted May 9, 2016 this might help clarify the position. http://www.widman.biz/uploads/Transaxle_oil.pdf Quote Link to comment Share on other sites More sharing options...
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