Anyone having long term success without using a dry sump system?

[DodgyTim]

I always assumed the concern was oil flowing in reverse up the block/head oil drain passages
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When we have one g of lateral load (could be acceleration, lateral or braking) the oil surface is 45 degrees to horizontal
1 g lateral.png

It gets worse though, at 1.5 lateral g's it becomes 56 degrees
1.5 g lateral.png