Originally Posted By: bamorris2
Does anyone know if there is a noticeable different in Redline's car and mc-specific oil? Does anyone use their 20w50 car oil?
This would be for use in a HD Big Twin sump (not shared).
Some info from the Redline website...
Their car oil 20W-50 is slightly thicker than their 20W-50 motorcycle oil. It is SM rated so it probably does not contain more than 1000 ppm zinc/phosporus.
Their motorcycle oil has a
LOT of zinc/phosporus (.25%/.21% by weight)
The motorcycle oil has 500 ppm moly. This is not listed for their 20W-50 car oil.
The motorcycle oil is $3/quart more than the car oil.
The car oil lists "Recommended for API SM/SL/SJ/SH/SG/CF and ACEA A3"
There are no listed specifications for the motorcycle-specific oil
I don't know of anyone around here that uses their automotive 20W-50 but there are many that like the motorcycle-specific Redline 20W-50.