Gearbox oil is GL4 really necessary

[Stirls]

All the manuals and specs call for GL4 gearbox oil but I have read that GL5 is now safe to use in our gearboxes as it has been upgraded, GL5 is a better oil apparently, anyone got any views on the subject please.

[itchyfeet]

Yes GL4 is needed

from memory

or GL4/GL5 which complies with both apparently.

GL5 rated only has extra additives that will dissolve the yellow metals in your gearbox, modern gearbox parts are different metals or coated I think or something like that.

Aidan or one of the other Gearbox specialists will be along in a minute to give you the proper explanation but that's close enough

[itchyfeet]

you read the Wiki of course

https://club8090.co.uk/wiki/Ge ... earbox_oil" onclick="window.open(this.href);return false;

[Stirls]

I did look on wiki but must have missed it, I'll go with the Comma SX for now just needs a top up, Thanks.

[jebiga41]

yes or GL4/5 unless you want bronze coloured oil with flakey bits in it

[Timburrows]

GL 5 is fine just make sure Aidan or Vantopia have space in 6 months time book your appointment NOW