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Engine knocking and outside temperature?

 
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Old 03 Nov 2010, 02:11 pm
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Question Engine knocking and outside temperature?

Apart from reasons of using a too low octane rating in the fuel,
does engine knocking appear more in the winter or in the summer?
In the winter there are areas below 32F (0C), while in the summer outside temperature could exceed 100F (36C) in the full sunshine.

Are there other factors that could invoke engine knocking?
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Old 03 Nov 2010, 02:50 pm
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Default Re: Engine knocking and outside temperature?

Yes. Every gasoline company uses different blends of fuel in summer than in the winter. They add different cleaners, different amounts of the dreaded Ethanol and all kinds of additives. If you find the type of gas is causing your engine to knock, try a different brand of gas. You might have to try that a couple times till you find a brand that's better for your car. That knocking sound is NOT good for your engine.

More of a technical question so I moved your post.
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