Just to dispel any lingering worries, VW 504.00/507.00 oil certification includes the ACEA 'high-temperature, high-shear' (HTHS) rating. This basically means the oil is endurance tested to exceed a continuous 150deg C.
![nerd :nerd:](https://www.golfgtiforum.co.uk/Smileys/modern/nerd.gif)
So providing you are using a decent quality LL3 spec oil - you are perfectly fine. Actually, the OP needs to tell his wife to try harder!
![grin :grin:](https://www.golfgtiforum.co.uk/Smileys/modern/grin.gif)