Quick Summary
Looking for the correct oil type for your 1991 Ford THUNDERBIRD? According to factory specs, the 3.8L 6 -cyl Engine Code [4] 4 requires 5W-30 viscosity oil. Using the right oil capacity of 5.0 QUARTS ensures engine longevity and fuel efficiency.
๐ข๏ธ 3.8L 6 -cyl Engine Code [4] 4 Most Common
Verified Data
Capacity
5.0 QUART
Viscosity
5W-30
Oil Filter
51516
๐ข๏ธ 3.8L 6 -cyl Engine Code [R] R
Verified Data
Capacity
5.0 QUART
Viscosity
5W-30
Oil Filter
EAO34
๐ข๏ธ 5.0L 8 -cyl Engine Code [T] HO T
Verified Data
Capacity
5.0 QUART
Viscosity
5W-30
Oil Filter
EAO15
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Common Trouble Codes for 1991 Ford THUNDERBIRD
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