[quote=@Willy Vereb]
Speaking of oil, I plan to have most of my vehicles being diesel-electric hybrids with the main fuel source being biodiesel.
All of these developments are practically available prior to 1940.
It won't be as good as modern hybrid engines of course but I can get a decent one working where on low or cruising speed it uses electric engines while the diesel is active on higher speeds. When peak performance is needed then both engines are turned on. As such I'll save a lot on oil albeit I'd still require a ton for other purposes or when biodiesel is less of an option.
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I personally believe that you shouldn't go bio-desial, it kind of makes me the only one who uses oil since everyone else is electric or going electric. I think that oil dependency would add more to the RP but if you have your heart set on bio-desial go for it.