The yellow/orange, not the green. I have a Yanmar 3ym30 diesel. Rick Sent from Yahoo Mail on Android On Tue, Dec 19, 2017 at 8:48 AM, Tom Talling<ttalling at gmail.com> wrote: What type of antifreeze should I use for my Yanmar diesel. What is the right color? Regards, Tom Talling 215-262-1427 Ttalling at comcast.net Sent from my iPad