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Thread: Spark Plugs: Same Number But Look Different

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    Certifiable Vanatic Z-Machine (aka VanZack)'s Avatar
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    Spark Plugs: Same Number But Look Different

    I bought some Autolite plugs for the 66. It has a 194 in it, so the guy at the parts store gave me a full box of 4, and pulled a couple out of another box to make 6. Now that I'm gapping them, I see they look different. Anyone know why? Does it matter?

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    1969 G10 108, 307 V8, TH350, 3.08 gears...for now...
    ...and the old 66...

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    Spark Plugs: Same Number But Look Different

    Could be different vendors who made them. I would not worry about it.
    Gary
    1965 Display

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    VCVC Member TurboVan's Avatar
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    I would go with the plated ones because the black ones rust
    Keep one foot in the gutter, one fist in the gold...

    '65 Panel, with turbocharged 327 (originally 153 four), TH400 (originally 3-speed), and 3.31 '67 Camaro 12 bolt rear (my first car, 1970)
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    '69 Sportvan 108 with turbocharged original 250 six and 700R4 (originally Powerglide), 3.73 rear, starred in eight Taco Bell commercials
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    Quote Originally Posted by TurboVan View Post
    I would go with the plated ones because the black ones rust
    Yeah, I might take the black ones back and get a couple more plated ones.
    1969 G10 108, 307 V8, TH350, 3.08 gears...for now...
    ...and the old 66...

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    VCVC Member Wookee's Avatar
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    Cool

    Autolite (Ford) plugs in a Chevy.

    My A/C Delco's have never let me down...
    Its a "van thing". A life style you have to live to understand!!!!

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    VCVC Member joyrde's Avatar
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    Quote Originally Posted by Z-Machine (aka VanZack) View Post
    I bought some Autolite plugs for the 66. It has a 194 in it, so the guy at the parts store gave me a full box of 4, and pulled a couple out of another box to make 6. Now that I'm gapping them, I see they look different. Anyone know why? Does it matter?
    As mentioned - - -AC Delco - - - all I ever use in Street machines - - - GM spends millions to get the correct sparkplug - - - I never second guess them

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    VCVC Member kookykrispy's Avatar
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    I've heard the autolite = ford, and delco = chevy "old wives tale" for years. I have run plenty of autolites in Chevy stuff. They are good plugs. If you have the right plug and heat range for whatever the application is, they will run great in a chevy also. Plugs don't care what brand the engine is.

    BTW, Edelbrock specifically recommends autolites in all their heads, including for Chevy.

    There's a great article on ChevyHardcore.com all about spark plugs. They feature autolites, and never once do they say not to run them in a Chevy. https://www.chevyhardcore.com/tech-s...-from-opinion/
    Last edited by kookykrispy; 01-22-2019 at 04:25 PM.



    64' wikivan 230/4 onda tree/2.56 posi
    '64 Red Baron no engine/trans
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    In a stock engine, I'll run whatever the cheapest plugs the parts store carries. Never had an issue. In fact, when I blew the head gaskets in the plow truck (89 GMC K2500) the only plug that looked bad was #8 cylinder- the one that was full of coolant. Passed the tip thru a propane flame a few times and blew it out with compressed air, good to go.

    The only time spark plugs really become critical is in a racing engine where you are running at the limit the entire time the engine is running. I used to get spark plugs from a buddy that raced circle track, he swapped them out each weekend. Just last year I finally ran out of them, I had a 15 year supply from two seasons of racing.

    The only engine I've ever had that was 'spark plug sensitive' is my Harley. It's a modified Evo motor with 100 cu in kit, Edelbrock heads and cam, and other go fast goodies. It's hp is close to double of what it was stock, and by the end of the riding season (approx 3000 miles most years) the plug in the front cylinder is cooked.
    Gregg Groff


    There's no place like 127.0.0.1

    1968 Chevy G20 108 panel Now with 454 power!

    1965 Chevy G10 panel- OHC Pontiac inline 6

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