I recently bought my 81 i.6 NA rabbit. It has about 99,000 miles on it. The injector pump was replaced by one of the previous owners. My question is this, is it OK to run some biodiesel through it to clean up the tank, lines, IP, injectors, etc.? A locl truck stop sells B12. I don't want it to eat up all my fuel lines, gaskets, etc. What are your thoughts? Thanks.