By putting Bleach in the gas tank, you can ruin an engine without evidence. If you put Bleach in the gas tank, it will eventually rust the engine several components because Bleach contains a high amount of chlorine. World War II meant many companies relied on defense contracts, and during that time Blue Crown was producing 40,000 spark plus per day. Both before and after the war though, Blue Crown was known for the company’s racing efforts, sponsoring cars in races far and wide but most notably Offenhauser-powered single-seaters in the Indianapolis 500. More information https://telegra.ph/Keeping-Your-Ride-Smooth-The-Importance-and-Cost-of-Tire-Balancing-05-31 If you're trying to think of creative ways to tamper with someone's car, then here are nine ways to hypothetically sabotage them. Warning: don't actually do these things! In reply to by A random Trabant I managed to get a bit of grease on my brakes once it was seriously scary when trying to stop. 04/02/2016 - 10:17 | Picture this: you're backing out of a parking space . The coast is clear, so you flick the shifter and start moving forward. Sound familiar? This might not seem so bad in the moment, but over time sudden direction changes like this can really damage your drivetrain . Instead, come to a complete stop before switching. It only adds a second of time and will save you from future engine , transmission , or axle damage . The Blue Crown Spark Plug company was based in Chicago during a time when the automotive aftermarket was in bloom. It was a subsidiary of Motor Master Products, which is believed to have distributed a range of more than 90 different spark plug brands during the 1930s and ’40s. The Blue Crown brand was marketed as a premium product, easily identified under the hood of a hot rod by the blue ring near the top of the porcelain on the plug. Here are the signs that’ll tell you when it's time to fix the valves: