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.

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!
