CF same as CF-4 rating?

Joined
Mar 28, 2009
Messages
26
Location
North Dakota/Minnesota border
Is a rating of CF the same as CF-4? I ask this because my Harley Davidson owner's manual says to use a 20W-50 that meets CF-4. I look at my bottle of Mobil-1 and is just says CF (among other designations). Thanks, Dennis
 
Joined
Oct 22, 2003
Messages
13,132
Location
By Detroit
I think the CF is very light diesel, like a passenger car maybe, wimpy stuff as diesel oil goes. I would recommend you get a full blown CF-4 rated oil for that bike. Valvoline makes a motorcycle 4-stroke oil, not sure the rating, can find out at valvoline.com though. Saw it at Murrays Auto (one of the CSK stores).
 
Joined
Aug 30, 2007
Messages
1,784
Location
Bonnyville, AB
CF is for light passenger car diesel engines, CF-4 is for "high speed" four stroke diesels, and CF-2 is the highest rating for two stroke diesels such as the Detroit Diesel two cycle engines. CF is not nearly as stringent of rating as CF-4. CF-4 has been superceded by CH-4, CI-4, CI-4+ and CJ-4.
 
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