1205 E Main St
Columbus, OH 43205
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Product Information

Product Details
Part No. AP45
Warranty Details (4 YR REPLACEMENT IF DEFECTIVE)
With over 100 years of engineering expertise and more than 11 billion plugs sold, Autolite delivers unmatched reliability. Designed and engineered in the USA, these spark plugs feature a high nickel alloy side electrode that maintains a precise gap and a full platinum tip that ensures virtually no gap erosion for extended life. The necked-down center electrode fires quicker and cleaner with less voltage, resulting in easier starts, quicker acceleration, and improved fuel economy compared to standard plugs. The tapered seat type further enhances performance and durability. For even greater performance, consider upgrading to Autolite Double Platinum or Iridium XP spark plugs.

Product Features:
  • High nickel alloy side electrode maintains precise gap
  • Full platinum tip assures virtually no gap erosion for long life
  • Necked-down center electrode fires quicker, cleaner with less voltage for easier starts, quicker acceleration and improved fuel economy (as compared to standard plugs)
  • Improved Fuel Economy: Designed to enhance fuel efficiency compared to standard spark plugs.
  • Tapered Seat Type: Enhances overall performance and durability.
Specifications
Center Electrode Core Material:
Platinum

Electrical Terminal Type:
Stud

Center Electrode Tip Material:
Platinum

Ground Electrode Core Material:
Nickel

Ground Electrode Quantity:
1

Ground Electrode Tip Design:
Tapered

Ground Electrode Tip Material:
Nickel

Reach:
0.433 in

Reach:
11 mm

Resistance:
4000

Pre-Gap Size:
0.044 in

Pre-Gap Size:
1.1 mm

Thread Diameter:
18 mm

Hex Size:
13/16" in

Hex Size:
21 mm

Seat Type:
Tapered

Resistor Type:
Yes

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4.69 out of 5
1653 Customer Reviews
87% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
1362
4 Stars
188
3 Stars
36
2 Stars
19
1 Star
48
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 1653 Customers
OEM replacement
Submitted 9 months ago
Quality equivalent or exceeding OEM spec. All 6 plugs were pre-gapped correctly.
Bottom Line Yes, I would recommend to a friend
Good plugs
Submitted a year ago
Better than original
Bottom Line Yes, I would recommend to a friend
Yes,I would.
Submitted a year ago
It's a set of spark plugs. Don't know anything good or bad about it. My car runs better.
Bottom Line Yes, I would recommend to a friend
It worked
Submitted a year ago
Did what it was intended to do. No worse no better
Bottom Line Yes, I would recommend to a friend
Spark plugs work as advertised.
Submitted a year ago
My van is running, so I assume the plugs are workin' fine. I'll update you at 50,000 miles.
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Are there plugs a good replacement for denso PKH16TT for my 2007 Nissan Frontier SE 6 cyclinder engine
Verified Reply - Steve
Hi Tommy, I'm glad to help you! This Autolite Single Platinum Spark Plug (Part # AP5325) is an exact fit for your 2007 Nissan Frontier SE.
Do I need to use anti seize?
Verified Reply - John the Car-Doc
Hi Shri, I'm glad to assist you! Autolite always recommending to consult the service manual for the vehicle being repaired and using anti-seize only where the original manufacturer recommends it. The nickel coating on this Autolite Single Platinum Spark Plug - Part # AP3924 provided added protection from seizing in aluminum cylinder heads and has made anti-seize less important in spark plug installations. Anti-Seize can alter the tightening torque up to 20%, increasing the risk of breakage. It can also create heat transfer and electrical conductivity concerns.
Is this plug comparable for 93 cadi Seville 4.6 Northstar engine? Noticed the preset gap is . 60 and the gap rating is . 50 for Seville sts, can I reduce the preset gap down to the . 50 rated gap and what do I need to reduce it if it's ok?
Verified Reply - Solomon
No Tony, this Autolite Single Platinum Spark Plug (Part # AP605) does not fit your 1993 Cadillac Seville. We do have an exact spark plug available online for your vehicle and the part number is 3951 and it has a gap size of 1.5mm. Use your spark plug gap tool to adjust the gap. Gently bend the ground electrode in to narrow the gap or bend it out to widen it. Be very careful when making adjustments. Don't bend the electrode more than a few fractions of an inch.
What socket fits this plug?
Verified Reply - Solomon
Hi Misha, happy to help you! Since you didn't mention the specific vehicle, it's hard to tell for sure. To give you the correct information I would need the year, make, model and engine size of the vehicle.
Does this fit an 2008 fx35
Verified Reply - John the Car-Doc
Yes, Shahyem! This Autolite Single Platinum Spark Plug - Part # AP5325 is an exact fit for your 2008 Infiniti FX35.
Displaying Question & Answer 1-5

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