Club 80-90 Forums

I have always used Millers 80W90 GL4
https://www.ebay.co.uk/itm/Millers-Oils ... :rk:1:pf:0" onclick="window.open(this.href);return false;

I wanted to try 75W90 as in the WIKI as I read it improved cold gear change.

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

Aidan wrote:The Carplan 75w/90 gl4/gl5 is what i use now

Carplan I assume is Carlube as google gives almost nothing made by Carplan? ( Please can somebody E D I T the WIKI)

I can't find this either, this is all I can find and if you look on the back it says GL5
https://www.ebay.co.uk/itm/Carlube-Ep-7 ... :rk:1:pf:0" onclick="window.open(this.href);return false;


All the 75W90 I can find is all fully synthetic and alot more than Millers 80W90 GL4 is that right?

From what I understood from various forums etc, the issue is the additives in GL5 once the gearbox oil hits 150deg C dissolving the bronze items in the box.

Cue - oil debate

Carlube does appear to be Carplan in a different guise.

CarPlan Car Care - Tetrosyl Limited - Registered in England. Company No. 537855 WEEE No: WEE/FK0071UZ
Group Websites : Tetrosyl CarPlan International Carlube Aqua-t Bluecol Tetrion Tetconnect T-Cut Triplewax

https://www.carlube.co.uk/?product_cat=driveline-mtf
then
https://www.carlube.co.uk/?product=75w- ... -synthetic

Thanks OBG but still not readily available and more than Millers ??

strange, I wonder what others are using, not many replies

https://www.ebay.co.uk/p/Carlube-KAR455 ... 7021398452" onclick="window.open(this.href);return false;

might pop into my local mortorworld and see if they can order it cheaper.

Oldiebut goodie wrote:Carlube does appear to be Carplan in a different guise.

CarPlan Car Care - Tetrosyl Limited - Registered in England. Company No. 537855 WEEE No: WEE/FK0071UZ
Group Websites : Tetrosyl CarPlan International Carlube Aqua-t Bluecol Tetrion Tetconnect T-Cut Triplewax

https://www.carlube.co.uk/?product_cat=driveline-mtf
then
https://www.carlube.co.uk/?product=75w- ... -synthetic

I've just order up Comma sx75w90 GL4 - careful as sx75w90 is also available in gl5.

5ltrs came in at £25 inc del from ebay.

I remember the gear oil from these guy's being recommended by Aidan a while back.........
https://www.smithandallan.com/products/ ... nsmission/" onclick="window.open(this.href);return false;

I use the Millers 80/90 Paul as Aiden confirmed this is fine for my bus.

T3luestar wrote:I remember the gear oil from these guy's being recommended by Aidan a while back.........
https://www.smithandallan.com/products/ ... nsmission/" onclick="window.open(this.href);return false;

Nice post
I just ordered some
I couldn't remember the name.

Aidan not Aiden

R0B wrote:Aidan not Aiden

This should be made sticky! Or maybe mods could set up an auto correct?

Sent from my ONEPLUS A3003 using Tapatalk

T3luestar wrote:I remember the gear oil from these guy's being recommended by Aidan a while back.........
https://www.smithandallan.com/products/ ... nsmission/" onclick="window.open(this.href);return false;

thanks
can you confim which one lots on that page?

GL5 mineral gear oils have sulfurized hydrocarbons as an extreme pressure additive for hypoid gears, but damages bronze/brass so shouldn't be used in our gearboxes, only GL4 oils which don't contain the additive.
Semi and fully synthetic gear oils because of their higher lubricity don't normally need the additive and if marked GL4/GL5 means they are suitable for either application.

R0B wrote:Aidan not Aiden

Sorry Dad!

He really does not like it being spelt wrong. Son!

bigherb wrote:GL5 mineral gear oils have sulfurized hydrocarbons as an extreme pressure additive for hypoid gears, but damages bronze/brass so shouldn't be used in our gearboxes, only GL4 oils which don't contain the additive.
Semi and fully synthetic gear oils because of their higher lubricity don't normally need the additive and if marked GL4/GL5 means they are suitable for either application.

This is the bit I'm unclear about if any GL4/GL5 is OK to use, thanks for the confirmation.

That's why so many are synthetic I guess.