Quick Summary
Looking for the correct oil type for your 1991 Chevrolet S10 PICKUP? According to factory specs, the 2.5L 4 -cyl Engine Code [A] A requires 10W-30 viscosity oil. Using the right oil capacity of 3.5 QUARTS ensures engine longevity and fuel efficiency.
๐ข๏ธ 2.5L 4 -cyl Engine Code [A] A Most Common
Verified Data
Capacity
3.5 QUART
Viscosity
10W-30
Oil Filter
EA15K29
๐ข๏ธ 2.5L 4 -cyl Engine Code [E] E
Verified Data
Capacity
3.5 QUART
Viscosity
10W-30
Oil Filter
EA15K29
๐ข๏ธ 2.8L 6 -cyl Engine Code [R] R
Verified Data
Capacity
4.5 QUART
Viscosity
10W-30
Oil Filter
EAO23
๐ข๏ธ 4.3L 6 -cyl Engine Code [Z] Z
Verified Data
Capacity
4.5 QUART
Viscosity
10W-30
Oil Filter
EAO23
Drain Plug Torque
18 ft/lbs
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Recommended Maintenance Products
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Motor Oil
Get the correct viscosity for your engine
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Oil Filter
OEM or premium aftermarket options
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Drain Plug Gasket
Replace every oil change - don't reuse!
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Oil Drain Pan
Catch and store used oil safely
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Funnel Set
No-spill oil pouring
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Mechanic Gloves
Keep your hands clean
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Common Trouble Codes for 1991 Chevrolet S10 PICKUP
Get vehicle-specific repair guides for these codes