Some motorcyle road racing groups use a "Pickle" flag specifically for OIL on the track. In that case they use a conventional red and yellow surface flag for anything else on the track and a black and green flag for oil. See the Flag Information page for more information on our flag construction. Add $1 shipping per flag. From the AMA Pro Racing 2004 Road Racing rules: a. Yellow Flag with Red Stripes: Indicates debris, fluid or a potentially hazardous situation on or near the track. Passing is allowed. Exercise caution. b. Lime Green with Black Stripes: Indicates the possibility of oil on the track. Passing is allowed. Exercise caution. Oil FxxP$25.00 Flag Size:: 30x3025x2525x3020x25 (Special Order) ©1998-2010 Dynamic DeZigns.