My eldest son played around, running his Toyota dual cab pick up like that, It took lots of amps that's all I can remember, But he didn't persist so it must have not been beneficial, All his vehicles run on his home made veg oil and have done for around the last 15 years. He hasn't got his Volvo trucks anymore, but the veg oil he used in those he had to pay, I think it was 27p revenue for every litre used,
These have been used in the jewellery industry for many years due to the powerful fine flame. Look up jewellery micro welder and you'll find them for sale. They're not practical for larger work really.