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Thread: Fuel

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    Default Fuel

    So since I'm a Gen Y person leaded fuel was before my time and I'm in need of some info for my 74 sedan can I put normal 98 in it or do I have to run lead additive ?

  2. #2
    Registered User EuroDat's Avatar
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    Back in the good old days your engine was fitted with silicon/bronze valve seats which are not suitable for unleaded fuel. You will burn the valves and seats using unleaded for prolong periods without a lead additive. I think Nissan changed to steel seats in Australia around the time the 280ZX came out, but I think that was more to simplify production. Australia didnt change to unleaded until 1985.
    The 98 is your best choice plus a lead additive or rebuild the head with steel seats which translates to a lot of lead additive.

    BTW Premium leaded was around 97 octane. GTHO's, RT chargers and XU1's loved the stuff. Thats my Gen...
    Chas
    Chas
    5/77 280Z HLS30 403100 with some modifications
    Original colour: 305 Light Blue. The PO changed it to Red

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    Registered User Mastadd240K's Avatar
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    Ran E10 In my 240k for about 3 years will no issues, but always intended to replace the engine


    Shannons 2014 Skyline Nationals :https://tinyurl.com/mcrtqux (ClassicZcars Thread)

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    Stocking up on additive then for my road trip

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