Originally Posted By: BradleyB
says not to use CD rated diesel oils. If I am not mistaken, the Rotella Synthetic is CD rated but also MA rated...what gives? I have been using the Rotella in my Honda Rincon for a couple of years now with no problems. Is there a reason that the Rotella wouldn't work?
API rating CD was introduced in 1955 and is currently obsolete
Quote API CD
"Service typical of certain naturally aspirated, turbocharged or supercharged diesel
engines where highly effective control of wear and deposits is vital, or when using fuels
with a wide quality range (including high-sulfur fuels). Oils designed for this service
were introduced in 1955 and provide protection from high temperature deposits and bearing
corrosion in these diesel engines."
If you wish to run a diesel oil in your motorcycle then I recommend one with an API
rating CH-4 or higher because it is formulated for "high speed" (what ever that means in
a diesel) I hope it means some kind of anti-foaming agent for high rpms...
Quote Api CH-4
"CH-4 Severe-Duty Diesel Engine Service This service oils are suitable for high
speed, four-stroke diesel engines designed to meet 1998 exhaust emission standards and
are specifically compounded for use with diesel fuels ranging in sulfur content up to
0.5% weight. CH-4 oils are superior in performance to those meeting API CF-4 and API CG-4
and can effectively lubricate engines calling for those API Service Categories."