does a 72 eldorado with a 500ci engine require leaded gas

Asked by Mar 29, 2012 at 03:46 PM about the 1972 Cadillac Eldorado

Question type: Maintenance & Repair

3 Answers

95

You never need to run leaded gas but it helps with the lubricity. You can always put additives into the gas for that and since its a 72 there is a good chance that it originally called for leaded gas.

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Thanks so much for your help.

3,105

beginning in 1971 General motors implemented the use of hardened exhaust vavle seats in smallblock truck motors . by 1972 ALL GM engines were equipped with hardened exhaust valve seats for low lead fuel . I doubt very much however that your 500 eldo motor will like anything but premium , I know my 74 New Yorker's 440 HP motor sure does ... PBN

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