Their are a couple additives to help with VSS. One is only sold in Europe but you can order with international shipping.
They apparently ran out in North America but ATP AT-205 Would probably work it dropped my oil leak 80% on my OFHG on my m54.
https://www.amazon.co.uk/dp/B0035Q0G...2YEE5ZMN51QRTX
That's the product. I will be getting some as preventive maintenance before we hit 100k miles