oil that is......<br />going to change the lower unit oil<br />(first time for me) i bought the pump<br />and a quart bottle in a kit,i dont want to find out i need more when im in the middle of this.not sure if i can get another qt of the same brand so can i mix or add to the first<br />i bought (lube Matic hypoid) 90<br /><br />for a 1999 johnson 115 spl