Best spark plugs for a 2008 Kia Optima
Spark plug listings at Advance Auto Parts
Advance Auto Parts
Autolite
Autolite Copper Resistor Spark Plug: Quick Starts & Enhanced Durability, 3924
MPN 3924
$5.49
Advance Auto Parts
Autolite
Autolite Double Platinum Spark Plug: Enhanced Durability & Performance, APP3924
MPN APP3924
$7.49
Advance Auto Parts
Autolite
Autolite Platinum Spark Plug (AP3924): Improved Performance & Durability
MPN AP3924
$5.49
Advance Auto Parts
Autolite Iridium
Autolite Iridium Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition, XP3924
MPN XP3924
$11.49
Advance Auto Parts
Bosch
Bosch OE Fine Wire Double Iridium Spark Plug: High Performance & Longevity, 9609
MPN 9609
$10.49
Advance Auto Parts
Champion
Champion Copper Plus Spark Plug RC12YC5 - Dependable Performance & Durability, 89
MPN 89
$4.99
Advance Auto Parts
Champion
Champion Double Platinum Power Spark Plug RC11PYPB4 - Enhanced Durability & Performance, 7070
MPN 7070
$7.49
Advance Auto Parts
Champion
Champion Iridium Spark Plug RC12WYPB4 - Maximum Performance & Longevity, 9201
MPN 9201
$10.99
Advance Auto Parts
Champion
Champion Iridium Spark Plug REC12WMPB5 - Maximum Performance & Longevity, 9055
MPN 9055
$12.99
Advance Auto Parts
Champion
Champion Platinum Power Spark Plug RC12PYC - Powerful Performance & Longevity, 3071
MPN 3071
$5.99
Advance Auto Parts
DENSO
DENSO Double Platinum Spark Plug: OE Performance, lasts 60K+ Miles, PK16R11, 3134
MPN 3134
$12.99
Advance Auto Parts
DENSO
DENSO Iridium Long-Life Spark Plug: OE Performance, SK16PR-A11, 3356
MPN 3356
$21.99
Advance Auto Parts
DENSO
DENSO Iridium Power Spark Plug: Maximum Spark Energy, 0.4mm Iridium Tip, IK16, 5303
MPN 5303
$10.49
Advance Auto Parts
DENSO
DENSO Platinum TT Spark Plug with Titanium Twin-Tip for Enhanced Ignition, 4505
MPN 4505
$7.69
Advance Auto Parts
Motorcraft
Motorcraft High-Performance Spark Plug: Enhances Fuel Efficiency & Reliability, SP-497-X
MPN SP-497-X
$6.99
Advance Auto Parts
Motorcraft
Motorcraft Platinum Spark Plug: Enhances Durability & Reduces Fuel Consumption, SP-497
MPN SP-497
$7.79
Advance Auto Parts
NGK
NGK G-Power Platinum Spark Plug (BKR5EGP): Enhanced Durability & Efficiency, 7090
MPN 7090
$8.99
Advance Auto Parts
NGK
NGK Iridium IX Spark Plug (BKR5EIX-11): Extreme Ignitability & Durability, 5464
MPN 5464
$13.99
Advance Auto Parts
NGK
NGK Laser Iridium Spark Plug (IFR5E11): Fine Wire Tip for Efficiency, 7994
MPN 7994
$23.99
Advance Auto Parts
NGK
NGK Laser Iridium Spark Plug (ILFR5B11): Fine Wire Tip for High Efficiency, 1637
MPN 1637
$27.99
Advance Auto Parts
NGK
NGK Ruthenium HX Spark Plug (FR5AHX): High Ignitability & Durability, 95839
MPN 95839
$19.99
Advance Auto Parts
NGK
NGK Standard Nickel Spark Plug (BKR5ES): Reliable OE Performance, 2460
MPN 2460
$6.99
Advance Auto Parts
NGK
NGK V-Power Nickel Spark Plug (BKR5E): Enhanced Ignitability & Reliability, 7938
MPN 7938
$6.99
Advance Auto Parts
NGK
NGK V-Power Nickel Spark Plug (LFR5A-11): Enhanced Ignitability & Performance, 6376
MPN 6376
$12.99Spark plug listings on Amazon
Brand and material notes
Copper plugs are often the least expensive. Platinum and iridium listings usually last longer and cost more. Use the merchant page and your owner’s manual — this site does not assign a heat range or claim a performance gain.
Before you buy
- Confirm the engine code on the vehicle or build sticker.
- Match the OE spark-plug number when you have it.
- Check plug gap, torque, and how many plugs the engine uses.
- Treat Advance and Amazon cards as separate offers, not the same SKU.
Other eligible years
- 2008
- 2006
This site contains affiliate links. We may earn a commission if you buy through Advance Auto Parts or Amazon. Listings come from merchant catalogs for the selected year, make, and model. They are not OEM confirmation of engine, plug gap, torque, heat range, or quantity.