Tony,
Thank you for the reply, I will pass the message on and help him make his Bio, I have now done about 150,000 on 100% Bio in My 86 landcruiser and it loves it . it must be good for the engine as mine has done 435000 and I still haven't done the injectors and it's not blowing smoke. A mate of mine who is a mechanic said " IF IT AIN'T BROKE LEAVE IT ALONE"
Thanks again for the info Oily