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Autolite Platinum Spark Plug: Improved Performance & Durability

(1684 reviews)
Part # AP26
4 year warranty
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Product Information

Product Details
Part No. AP26
Warranty Details (4 Year Warranty)
Autolite Platinum spark plugs are crafted for superior performance and durability, making them ideal for older engine applications. Featuring a platinum center electrode firing tip, these spark plugs ensure quicker firing, smoother starts, enhanced acceleration, and improved fuel efficiency. The platinum firing tip prevents gap erosion, extending the service life, while the high alumina ceramic insulator offers excellent thermal conductivity and insulation for added strength. A multi-rib insulator design prevents flash-over, ensuring reliable operation, and the nickel-plated shell resists corrosion for long-lasting durability. With a mid-projection standard center electrode and a tapered seat type, these performance-grade spark plugs deliver consistent results. The combination of platinum and nickel materials in the electrode tips further enhances reliability, making them a trusted choice for maintaining engine efficiency and longevity.

Product Features:
  • Engineered with a platinum firing tip that prevents gap erosion for longer service life.
  • Its high alumina ceramic insulator provides thermal conductivity and superior insulation for increased strength.
  • The multi-rib insulator prevents flash-over.
  • Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended life.
  • Incorporates a mid-projection standard center electrode design to ensure consistent performance and reliable engine operation.
Specifications
Center Electrode Core Material:
Copper

Center Electrode Design:
Standard

Center Electrode Projection:
Mid Projection

Center Electrode Tip Material:
Platinum

Electrical Terminal Type:
Non-Removable Nut

Electrode Tip Material:
Platinum

Grade Type:
Performance

Ground Electrode Core Material:
Nickel

Ground Electrode Quantity:
1

Ground Electrode Tip Design:
Standard

Ground Electrode Tip Material:
Nickel

Hex Size:
5/8 in

Hex Type:
Hex

Indexed:
No

Insulator Material:
Ceramic

Manufacturer Heat Range:
7

Pre-Gap Size:
0.045 in

Reach:
0.431 in

Resistor:
Suppressor

Resistor Type:
Yes

Seat Type:
Tapered

Skirt:
Yes

Thread Diameter:
14 mm

Tip Configuration:
Power

Washer(s) Included:
No

Wrench Diameter:
5/8 in
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4.69 out of 5
1684 Customer Reviews
88% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
1386
4 Stars
192
3 Stars
37
2 Stars
19
1 Star
50
Great plugsSolid spark plugsAffordable Spark Plug
I would never buy this product againGood product!  Good service too!Yes will buy again . PerfectDo not use in a jeep 4.0 wranglergreat performance
Pros
83
Improves Engine Efficiency
67
Easy To Install
52
Increases Power
49
Durable
14
Lightweight
Cons
10
No Improvement In Performance
4
Decreases Gas Mileage
4
none
2
None
1
Completely worthless
Best Uses
85
Everyday Driving
62
Replacement
19
Performance Driving
15
Restoration
5
Racing
Car & Truck
8
Casual Driver
6
Auto Enthusiast
4
Truck Enthusiast
3
Mechanic
1
Jeeper
Describe Yourself
41
Auto Enthusiast
40
Casual Driver
34
Mechanic
15
Truck Enthusiast
4
Competitive Driver
Most Liked Positive Review
great performance
I used these plugs before and have installed them in every truck I have bought. I have noticed increased fuel mileage and increased performance right from the start and they last for more than 50 thousand miles at a time. I average over thirty thousand miles a year on my truck and have gone a couple years between replacement with out any problems or plug failure or drop in performance. I would recommend these plugs to any one who want a good plug with out breaking the bank and want's to to protect their motor.
Most Liked Negative Review
Autolite plugs
Still testing,but runs cooler.
Reviewed by 1684 Customers
spark plugs
Staff Reviewer -
good product at a good price
Bottom Line Yes, I would recommend to a friend
Good plug
Staff Reviewer -
Autolite has allways run good for me
Bottom Line Yes, I would recommend to a friend
very good
Staff Reviewer -
great replacement product
Bottom Line Yes, I would recommend to a friend
EXCELLENT GOOD PRODUCT
Staff Reviewer -
none
Bottom Line Yes, I would recommend to a friend
Plug for Autolite Platinum plug
Staff Reviewer -
Ordered the plugs on line (got the best price I found). Drove to Advance Auto, and after I showed enough ID, picked up the parts. Out of habit, I checked the gap and found two of the plugs were gapped at .050 instead of the .043 reccomended. No problem regapping. Installed the plugs using some thread lube to ease installation and ensure easy replacement when the time comes. Reconnected the spark plug wires and the engine started immediately. After two weeks of use, I find the engine idles more smoothly and has better pick-up
Bottom Line Yes, I would recommend to a friend
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