I have been putting DFI oil in my Optimax for the past year and a half since I bought the boat. I was running low on oil and did not have the time to drive a few towns away to get more. I ended up going to walmart and picked up the quicksilver stuff. I bought the Premium Plus because that is all they had at the time and I read that back of the oil bottle and it said it was for DFI engines. I spoke with a marine mechanic to make sure it was ok to use this oil with my optimax. He said that it was fine...well I today I just put it in the oil reserve and noticed that this oil is green while the oil I have been putting in the boat is brown.
I know that both oils are okay to be used with an optimax but is it okay for them to be mixed?