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Is 4 year old gas in a 1987 Corvette any good?

Four-year-old gas in a 1987 Corvette is almost certainly bad and should not be used. Gasoline degrades over time, even when stored properly. After four years, it's likely to have:

* Significant varnish and gum buildup: This can clog fuel injectors, carburetors (if it has one), and fuel lines.

* Reduced octane rating: This can lead to engine knocking and potential damage.

* Water contamination: Water can settle in the tank and mix with the gas, causing rust and other problems.

* Loss of volatility: The gas may not vaporize properly, leading to poor engine performance.

Even if the car starts, running it with old gas risks significant and costly repairs. Draining the tank and replacing the fuel with fresh, high-quality gasoline is absolutely necessary before attempting to run the engine. You should also consider having the fuel system thoroughly cleaned, especially the fuel injectors, to remove any accumulated residue.

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