The big difference between the two is the fact that the glycerin is removed from the oil in Bio. Yes, With Bio, you will have the glycerin to dispose of. WVO runs it through the motor.If the glycerin gets into and builds up in the crankcase......problems.

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81 Mercedes 300SD 289k.......SOLD
82 Mercedes 300CD 252k......slow ride

82 mercedes 300 SD...mi Unknown
83 Mercedes 300D ????ksniff..gone too
84 Mercedes 300D 148k........SOLD
85 Mercedes 300TD 386k and holding some one elses project