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not necessarly.... although you might suffer from slightly less performance than with premium.
premium grade fuel (higher octane) has more burn resistance, so it's less prone to pinging from advanced timing or detonating from high compression. basically, you can expect a "better burn" in a high performance engine using higher octane fuel.
for normal driving, where you aren't necessarily trying to get the most performance out of your engine, you should be fine with normal grade fuel, although in a sense, premium would be "better".
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