Autolite Copper Core spark plugs deliver quick starts, good fuel economy, and smooth acceleration. The copper-glass seal bonds insulator and terminal post center electrode together to ensure full required voltage at spark gap, creating a gas-tight seal that is 100 percent leak-proof. Copper Core spark plugs feature a cold-formed steel shell and precision rolled threads, and a one-piece terminal post that adds strength. The multi-rib insulator reduces the danger of "flash-over" to prevent misfires, and the resistor reduces radio frequency interference (RFI) and electrode erosion. The full copper core electrode provides better performance in all conditions. Autolite Copper Core plugs are your industry standard.
Autolite Copper Core spark plugs deliver quick starts, good fuel economy, and smooth acceleration. The copper-glass seal bonds insulator and terminal post center electrode together to ensure full required voltage at spark gap, creating a gas-tight seal that is 100 percent leak-proof. Copper Core spark plugs feature a cold-formed steel shell and precision rolled threads, and a one-piece terminal post that adds strength. The multi-rib insulator reduces the danger of "flash-over" to prevent misfires, and the resistor reduces radio frequency interference (RFI) and electrode erosion. The full copper core electrode provides better performance in all conditions. Autolite Copper Core plugs are your industry standard.
Autolite Copper Core spark plugs deliver quick starts, good fuel economy, and smooth acceleration. The copper-glass seal bonds insulator and terminal post center electrode together to ensure full required voltage at spark gap, creating a gas-tight seal that is 100 percent leak-proof. Copper Core spark plugs feature a cold-formed steel shell and precision rolled threads, and a one-piece terminal post that adds strength. The multi-rib insulator reduces the danger of "flash-over" to prevent misfires, and the resistor reduces radio frequency interference (RFI) and electrode erosion. The full copper core electrode provides better performance in all conditions. Autolite Copper Core plugs are your industry standard.
Autolite Copper Core spark plugs deliver quick starts, good fuel economy, and smooth acceleration. The copper-glass seal bonds insulator and terminal post center electrode together to ensure full required voltage at spark gap, creating a gas-tight seal that is 100 percent leak-proof. Copper Core spark plugs feature a cold-formed steel shell and precision rolled threads, and a one-piece terminal post that adds strength. The multi-rib insulator reduces the danger of "flash-over" to prevent misfires, and the resistor reduces radio frequency interference (RFI) and electrode erosion. The full copper core electrode provides better performance in all conditions. Autolite Copper Core plugs are your industry standard.
Last updated at 03/21/2026 17:04:59
Autolite Standard Copper Resistor Spark Plug (3924) | Autolite | Nickel
Delivery $18.69
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AUTOLITE Spark Plug 3924
Free delivery between 26 Mar – 4 Apr
AUTOLITE Spark Plug 3924
Delivery between Mon – Wed $22.70
Autolite 3924 Copper Resistor Automotive Replacement Spark Plug (1 Pack)
Delivery $28.38
Autolite Copper Core Spark Plug - 3924
Delivery between Tue – Fri $8.99
Autolite 3924 Copper Resistor Spark Plug
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Autolite Spark Plug 14 mm Thread 0.750 in Reach Gasket Seat Resistor (3924)
Delivery $8.80
originally posted on autozone.com
AutoZone provided a check engine lite tester, and the Autuzone associate told me how to use it. He printed out the test results and helped me select the Autolite spark plug. The Check Engine lite did not come on after new spark plugs were installed and the lite was reset.
originally posted on supercheapauto.com.au
Cheap trash. for starters, theres no protective cover to preserve the gap so they all had to be individually measured.When we installed these, they caused my engine to make a horrible noise and my check engine light turned on. As soon as i replaced them NGK branded spark plugs, the check engine light turned off, and the engine ran much more smoothly and quieter.I will not be purchasing any Auto lite branded parts again.
originally posted on supercheapauto.com.au
Good 😊This star plus is good, it is made according to the generation, it is good that the car is very smooth, after using it, it is good if you keep using it often in the car, it is long term, it has a lot of capacity.
| Thread Size | 14mm X 1.25 |
| Reach | 3/4" |
| Hex Size | 5/8" (16mm) |
| Seat Type | Gasket |
| Tip Configuration | Mid Projection |
Autolite Standard Copper Resistor Spark Plug (3924) | Autolite | Nickel
Delivery $18.69
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
AUTOLITE Spark Plug 3924
Free delivery between 26 Mar – 4 Apr
AUTOLITE Spark Plug 3924
Delivery between Mon – Wed $22.70
Autolite 3924 Copper Resistor Automotive Replacement Spark Plug (1 Pack)
Delivery $28.38
Autolite Copper Core Spark Plug - 3924
Delivery between Tue – Fri $8.99
AutoZone provided a check engine lite tester, and the Autuzone associate told me how to use it. He printed out the test results and helped me select the Autolite spark plug. The Check Engine lite did not come on after new spark plugs were installed and the lite was reset.
Cheap trash. for starters, theres no protective cover to preserve the gap so they all had to be individually measured.When we installed these, they caused my engine to make a horrible noise and my check engine light turned on. As soon as i replaced them NGK branded spark plugs, the check engine light turned off, and the engine ran much more smoothly and quieter.I will not be purchasing any Auto lite branded parts again.
Good 😊This star plus is good, it is made according to the generation, it is good that the car is very smooth, after using it, it is good if you keep using it often in the car, it is long term, it has a lot of capacity.
I've found the Autolite spark plugs to last longer then other spark plug brands I've tried. I'll definitely be sticking with Autolite from now on and hats off to supercheap for quick delivery. Happy customer.
Lazy employee wouldn't get off his butt. He blew me off by selling me the wrong product because he wouldn't check the make.
Jason was very helpful and very respectful when trying to order the spark plugs. This man needs a raise!
These plugs replaced the OEM plugs in my lawnmower. I appreciate having parts available at my local Oreillys.
Went to three businesses to purchase this spark plug and none of them had one. Stopped at Auto Zone and yes they had 9 of them. In the future, if I need a spark plug, I know where I will be going.
Had a heavy misfire. Easily installed new plugs. Car ran as smooth and as flexible as it ever did.
these fit perfect and now my car goes faster because it had some extra special plugs and my car just works better with regular copper spark plug. i gapped than a little smaller than factory and car runs super
| Thread Size | 14mm X 1.25 |
| Reach | 3/4" |
| Hex Size | 5/8" (16mm) |
| Seat Type | Gasket |
| Tip Configuration | Mid Projection |
