Mazda B-Series Truck 1991–1999 — technical service bulletin
Bulletin 01799 · NHTSA communication 606027 · issued May 28, 1999
Technical service bulletin
communication type
Engine and Engine Cooling
component
1991–1999
model years
10
vehicle entries
Official summary
Motor oil - sae viscosity grade recommendation. *tt
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.