6 Speed Gearbox and LSD oils

[m3inter]

Hi All,

I'm looking at doing a gearbox and LSD oil change on my 1999 Superlight.

I have the 6 speed Caterham box. I've looked up the oil on the Caterham catalogue and I understand I need 75w90 GL4 oil.
I would happily go to Caterham and buy this as they're just down the road but they're out of stock.

What brands of this 75w90 GL4 would people recommend?

Further to this, I want to do a Diff oil change. I have an LSD. I've read about the Lube Guard additive but I'm not sure if this is relevant to my Diff? Again, this time I understand I need an 80w90 GL5 oil. which I can get from Caterham but do I need the Lube Guard?

Many thanks everyone

[m3inter]

Thank you for this chaps..

Viper, what brand of the GL5 with lube guard are we talking? Would the 'Comma EP80w90 GL5' be ok? And I need to add the Lube guard from Caterham to this oil separately correct?

[m3inter]

Thank you for your time and knowledge mate. I've gone and got you oils today. Will get this licked in the coming weeks