The Porsche 924 Owners Club
http://porsche924.co.uk/forum/

924 tech specs reference thread
http://porsche924.co.uk/forum/viewtopic.php?f=10&t=30151
Page 10 of 10

Author:  Mylando [ Wed Sep 23, 2020 7:24 pm ]
Post subject:  Re: 924 tech specs reference thread

Ah, a what oil thread...

GL4 was the original spec, looking at my service book but that's probably as much to do with GL5 not being common then. GL4 is clearly fine as doesn't have the sulphur.

GL5 would appear to be fine, as Porsche recommend it now. Lots of info about the damage GL5 can cause in the wrong box is out there. It would appear Porsche/Audi boxes are not that type. GL5 should be fine but I'll stick with GL4 as I see no benefit vs the potential risk.

However, as with all these things, the worst damage is caused by old oil. GL4 or GL5 are both cheap so a full drain should be done as often as you can.

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