LOOKING FOR MANUAL FOR BOLLENS 6.0 HP FRONT TINE ROTOTILLER MODEL 21A332C765. i HAVE 2 OIL RESERVOIRS ON THE BRIGGS AND STRATTON ENGINE. BOTH ON RIGHT FRONT ONE ABOVE THE OTHER. LOWER ONE IS YELLOW CAP AND IS FOR MOTOR OIL. UPPER ONE HAS A CLEAR WHITE CAP AND HAS SOME CLEAR OIL IN IT. MY QUESTION IS, WHAT OIL TYPE IS THIS CLEAR OIL? i NEED TO ADD MORE. THANK YOU FOR ANY HELP. DAVID