Lube oils are also a matter of concern to decrease the consumption of petroleum
Well, we can get biodiesel, SVO, WVO, biomethane, ethanol, whatever, but the engines won't run without lube oil. We might remember that the original Castrol oils had Castor oil in the formula, altough blended with mineral oil, and that palm oil has the same lube properties as synthetic oils. Currently I only see some support to the usage of vegetable-based lube oils among the 2-stroke enthusiasts, altough it can also work for 4-stroke engines in matter of decreasing the accomodated reliance on petroleum.
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