Hi and welcome aboard Brobin,
I have not run any petro diesel since I bought the car, maybe I'll have to try a tankful to do a comparison. When I bought the car it had 1/4 of a tank of petro diesel which lasted me for the first week before I put in my B100. It has been bugging me that there was a drop in acceleration and possibly increased fuel consumption since then. That's why I've been asking questions about injector timing on a separate thread. I'm sure that if the timing is optimised to suit the fuel it will make a big difference.

But just to put things in perspective, before I bought the Pug, I was looking to buy a diesel ute. I test drove a few 2nd hand diesel Hilux (non-turbo) and they have performance like a golf cart (my apologies to Hilux owners). The Pug really flies once it gets rolling and so much more comfortable & quiet. I know it's not apples with apples, but as a project car for biodiesel the Pug is well mannered and performs pretty much like regular petrol powered family car. Driving technique is different though, instead of knocking it down a gear going up hills, I just put put my foot down and the thing hauls like a train.

I think the guys with big diesel 4WD's don't notice so much of a reduction with bio, maybe there's more power & torque to spare.

A guy at my work has a brand new VW Golf 2.0TDI and he let me have a drive. Man that thing is nice. Goes like an F1 compared to the Pug. It hauls ass right from idle and sweet acceleration.

By the way, tell me more about 'spiral twisters'? where do you get them? Are the easy to fit?