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    Nissan Nissan Advice
    My wife and I recently bought an old motor-home and we are slowly doing it up so we can travel across the Nullarbor and up the west coast in 2004. The vehicle is an '85 Nissan twin cab with a lazy axle. Can I run it on unleaded fuel?
    Answered by CarsGuide
    11 December 2003
    Graham Smith

    The most important thing to determine if your vehicle will run happily on unleaded is the valve seats. If your engine has a cast iron head without hardened valve seat inserts it's best not to use unleaded without an upper cylinder lubricant to cut down wear on the seats. If, as I suspect, your Nissan has an alloy head with inserts, it should run on unleaded without a problem. Then you must consider the octane rating of the fuel. Regular unleaded has a low octane rating, 91, and that might ping in your engine; if it does, use PULP (premium unleaded) which has an octane rating of 96. If in doubt use unleaded and an additive like Valvemaster, which is available at most servos.

    Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice. Carsguide is not liable for the accuracy of any information provided in the answers.
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