There is a thread on biodiesel on the Polish Peugeot Club forum, and those who use the locally available bioester (esterified rapeseed oil, I believe) wrote that they haven't noticed any change in FE or power. I'm running with some in my tank (about 3% bio) and no difference (I'm assuming that my slightly worse FE is b/c my summer tires are wider
).
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is
where you're going, not
how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread