Engine Oil Recommendations; The Api Certification Mark - Ford Thunderbird Owner's Manual

Engine Oil Recommendations

We recommend using Motorcraft oil or an
equivalent oil meeting Ford Specification
WSS-M2C153-F and displaying the American
Petroleum Institute CERTIFICATION MARK on
the front of the container.

The API Certification Mark

Never use:
"Non-Detergent" oils
Oils labeled API SA, SB, SC, SD, SE, SF or SG
Additional engine oil additives, oil treatments
or engine treatments
Engine oils with an SAE 5W-30 viscosity are
PREFERRED for your vehicle. They provide the
best engine performance, fuel economy and
engine protection for all climates down to -15˚F
(-25˚C).
Synthetic engine oils which are CERTIFIED and
of the preferred viscosity may be used in your
engine. The engine oil and oil filter must still be
changed according to the maintenance schedule.
201