I find it hard to believe that a trace of fuel dilution drops the vicosity by 20% from new. Most likely the dilution is higher but there can and likely will be some mechanical shear aswell.
But no harm so far.
Most engines are not prone to wear, but there are exceptions.
And for me, stuff like DLC or Nicasil or any material that doesn't work very well with every possible oil blending additive concerns me, and I'd rather not have it in my engines.
Being a horizontal engine, it's likely to consume...
depends on the tyres I guess. 85k might have just gotten new, the 120k might have nearly worn? that only applies if they're decent tyres that you won't want to get rid of
I pass by the Donaldson European Headquarters a couple times a week too. Sure wish they made stuff that I could use. I used them on the busses I maintained (evobus citaro air filters)
I said that because a lot of modified cars are actually well trashed rather than well sorted. But 1.1G is is not in the realm of impossible (also not at roundabouts if it's quiet on the road). I hope the owners are informed that they need to keep the oil above maximum, which I also do when I...