The Total Quartz oil mentioned (9000 5W/40 Fully Synthetic - LL-01) is just under €30 for 5L.

Anyone using Castrol Magnatec? You can get 5L for €40 on MicksGarage at the moment.

It has a 5W-30 C3 version which is LL-04. From what I've read, the oil specs are backward compatible so you can use LL-04 or LL-01 in an LL-98 spec'd engine, but not LL-98 in a LL-01 spec'd engine.

Is the magnetic clinging property and the R&D of the Castrol worth an extra tenner or two?