hay i know guys that change there oil and put what they get out back in the tank for fuel..i never tried it thought about it but just couldnt....but hay i did the trans thing it works...and oil is part of fuel anyway right........so hay maybe a qt here qt there never know........and about that red fuel...i know you know but please dont get cought on the road with it from what dot told me in nc its 1500 per gal. that you have in the tank.....i got stopped and they checked my fuel once in the 72hr check point man they go through everything from lug nuts to air press. so keep it on the farm your good highway be careful....