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  1. Fluids and Plugs question...

    C900 Performance, Mods & Tuning
    For a modified, high boost, '88 SPG with an oil and water cooled turbo. What is the best coolant? best engine oil (including viscosity)? and what are the best spark plugs? I know "best" is sorta relative...but what works well, what should I avoid? Thanks, AJ