Germany did not lose the Battle of Britain

[kimosabi]

Originally Posted by Blackdog_kt

This is not about fuel economy,it's for making the engine easier to start.

According to one of the guys that was there, yes it was. DB601's(or 605's for that matter) never had start problems compared to carburetted allied engines. Fuel savings by thinning out the oil a bit compared to warming up a 35/37L V12 every hour is pretty self explanatory. It was also a great compromise because cold starts with dilluted oil kinda messes up the viscosity quite a bit. Some claimed that the gasoline in the oil would vapourize and ventilate out from the crankcase but they also knew that cold starts with that dilluted oil would put more friction on internal components as opposed to warm ups thus decreasing the engine's operating time between rebuilds/check ups. Which is pretty accurate.