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.
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
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
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.
1982 Camper 1970 1500 Beetle Various Skoda's, Ariel Arrow
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.
1988 DG WBX LPG Tin Top
1989 DJ digijet WBX Holdsworth Villa 3 Pop Top itchylinks