http://www.iwillteachyoutoberich.com/blog/value-not-cost-part-1/ Personal finance blog for college students, recent graduates and everyone else -- including entrepreneurship -- for getting rich. Featured in the Wall Street Journal and New York Times. Sun, 8 Nov 2009 06:09:27 -0800 http://wordpress.org/?v=abc hourly 1 http://www.iwillteachyoutoberich.com/blog/value-not-cost-part-1/comment-page-1/#comment-492 Ervin Fri, 07 Oct 2005 18:21:25 +0000 http://www.iwillteachyoutoberich.com/blog/value-not-cost-part-1#comment-492 The spreadsheet works even in the RSS file. Amazing! The spreadsheet works even in the RSS file. Amazing!

]]> http://www.iwillteachyoutoberich.com/blog/value-not-cost-part-1/comment-page-1/#comment-491 Ginsberg Fri, 07 Oct 2005 18:03:27 +0000 http://www.iwillteachyoutoberich.com/blog/value-not-cost-part-1#comment-491 Premium Vs. Regular gas... I'm an automotive engineer, and people should understand that premium gas should be used when your car *requires* it, and putting it in any other car will make *absolutely no difference* for the vehicle. The octane number is a measure of how easily the gasoline combusts. Performance vehicles (i.e. Mercedes-Benz, Jaguar) have engines with higher "compression ratios". If you use low-octane (regular) fuel with a high compression ratio engine, the fuel can combust before the spark (due to higher pressure coming from higher compression), causing a phenomenon known as "knock" which will severely damage the engine. Thus these engines do require high octane (premium) fuel, and will tell you so near the gas cap. Now, using premium fuel in a low/average-compression ratio engine (i.e. my Ford Focus) does nothing. There is no risk of knock causing damage in these engines with any type of fuel. If you read anywhere that there are other benefits to using premium, I sincerely believe you are being tricked into buying a product you do not need. Premium Vs. Regular gas… I’m an automotive engineer, and people should understand that premium gas should be used when your car *requires* it, and putting it in any other car will make *absolutely no difference* for the vehicle. The octane number is a measure of how easily the gasoline combusts. Performance vehicles (i.e. Mercedes-Benz, Jaguar) have engines with higher “compression ratios”. If you use low-octane (regular) fuel with a high compression ratio engine, the fuel can combust before the spark (due to higher pressure coming from higher compression), causing a phenomenon known as “knock” which will severely damage the engine. Thus these engines do require high octane (premium) fuel, and will tell you so near the gas cap. Now, using premium fuel in a low/average-compression ratio engine (i.e. my Ford Focus) does nothing. There is no risk of knock causing damage in these engines with any type of fuel. If you read anywhere that there are other benefits to using premium, I sincerely believe you are being tricked into buying a product you do not need.

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