hi all

Can i run my carpermanently

using 50/50 Biodiesel and fossilsl fuel
Will damage it damage my car.

Danny,
The answer depends on the car you have. Some vehicles have seals and sensors which are incompatible with biodiesel above 30% (recent cars from Pugeot for example).
Other cars may have other issues but some can have replacement seals of a biodiesel resistant material fitted.

Most cars from before 2000 will happily run on 100% biodeisel so 50% would be easy.

Regards,
Tony