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    Ask Smithy Xtra Fuel for rebuilt VH Commodore

    Holden Holden Advice Holden Commodore Holden Commodore Advice Holden Commodore 1981
    My son and I are re-building a 1981 VH Commodore. We will be re-building the 202 blue motor with a re-worked 'Yella Terra' type head, sports cam and Holley carburetor. Should we use unleaded with an additive, a premium unleaded fuel similar to 'Vortex'?
    Answered by CarsGuide
    6 July 2010
    Graham Smith

    The VH was built in the days before we had unleaded fuel. In standard form the 202 cubic inch six had a compression ratio of 8.8:1, so it would have been running on the Super fuel of the day. Fitting an aftermarket head is probably going to increase the compression ratio, and you’ve got a sports cam, so I would tend to run it on 98-octane fuel, and it will need an additive like Flashlube of Valve Saver if you don’t have hardened valves and valve seats. If you don’t have those I would recommend you fit them in the rebuild, that way you could use unleaded fuel without an additive.

    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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