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914 Geek
Join Date: Dec 1969
Location: Silly-Con Valley
Posts: 14,931
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If your engine is a stock 2.0 liter 914-4 motor, run regular grade fuel in it. It was designed for ~87 octane (87 AKI [US pump octane] == 91 RON [European pump octane]) so regular fuel is great for it. If you have a non-stock motor, then talk to your engine's builder.
--DD
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