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Service bulletin SMB191

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10175959
Published by NHTSA2020-06-02
Manufacturer's numberSMB191
Manufacturer's date2020-05-06
NHTSA componentENGINE; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

NHTSA's summary

Service Manual Bulletin - Changes to Cummins ISLG and L9N engine oil specifications and oil change intervals.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Equipment and accessories, Labels and manuals

Vehicles listed
NEW FLYER C30LF2001 to 2002
NEW FLYER C30LF2004 to 2005
NEW FLYER C35LF1998 to 1999
NEW FLYER C35LF2001 to 2002
NEW FLYER C35LF2004 to 2009
NEW FLYER C35LFR2009 to 2012
NEW FLYER C40FLR2012
NEW FLYER C40HF1996 to 1997
NEW FLYER C40LF1996 to 2013
NEW FLYER C40LFR2006 to 2013
NEW FLYER L40LF1998
NEW FLYER L40LF2004 to 2006
NEW FLYER L40LFR2009
NEW FLYER XN352013 to 2020
NEW FLYER XN402011 to 2020
NEW FLYER XN602010 to 2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.