View Full Version : Ok to mix

07-27-2007, 08:55 AM
Stupid question. Is it ok to mix Motul 5.1 and Motul RBF? I have Motul 5.1 in my system now and want to know if i can top off with RBF.

07-30-2007, 10:03 PM
I would assume its ok to top off. It says you can on engine oil with different weight/brand