I ran bio in my 82 Chevy Diesel and found that the tank strainer got plugged with fat from using french fry oil. I would suggest removing the tank strainer altogether. That way you can change the filters when they plug and not have to get down and dirty to change the tank strainer. I was running 50/50 oil and Diesel. I strained the oil to 5 mics. but didn't clean the oil to remove the fat. This method did work well in the S. Texas heat but did require cleaning the tank strainer more often that I would have liked. Also, you can't change the strainer on the side of the road as you can the filters.