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Author Topic: Using non JASO-MA oils in the Iron barrel crankcase.  (Read 206 times)


  • Scooter
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Using non JASO-MA oils in the Iron barrel crankcase.
« on: March 20, 2013, 03:23:00 AM »
Considering the iron barrel's engine oil is not shared by the clutch, will it be better to use a non JASO-MA oil in the crankcase like the one we put in , say car engines? JASO-MA oils would probably have some friction modifiers for wet clutch uses , which our iron barrel wouldn't need.

I'd love to try a diesel engine oil in it but Indian summers and 15W40 oils don't seem right. The availability of petrol (gasoline) engine oils in 20W50 weight is good.

2002 RE Electra CDI

  • Grand Gearhead
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  • Ace Performance Bullets and Ace Fireball 535
Re: Using non JASO-MA oils in the Iron barrel crankcase.
« Reply #1 on: March 20, 2013, 06:55:19 AM »
It's okay to use regular motor oil in it.
It's preferred to use a motor oil with at least 1000ppm zinc and 1000ppm phosphorous in it , like the older oils had. Some of the newer "off road" oils still have the zinc/phosphorous additives package which is sometimes called "ZDDP".
These additives give improved life to the cams and lifters, and many new road-rated oils have discontinued them because roller lifters are now so prolific and don't need them.
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