A testament to todays oils I guess. And im thinking manufacturers original Ratios no longer apply.
Very true, that. Few people outside of the lubricant/tribology [lubrication engineering] field realise just how great the advances in these technologies have been, in the period 1950's to the present day.
Changing the fuel mix ratios can be a bit tricky though; as the changes in density, viscosity and surface tension of the fuel/oil mix will also have a significant effect on the fuel/air mixture ratio that a carburettor achieves. All else being equal, lowering the oil content will tend to richen the mixture.
