Chevrolet Impala Oil Drain Plugs Available Here. Changing the oil and filter in a car is very routine; however, sometimes after an oil change you can still leak oil. One of the main culprits of this is due to oil drain plugs that have been damaged over multiple oil changes. While the threading on the sump rarely goes bad, the threading on oil plugs can be damaged during routine maintenance when changing the oil. Here at MicksGarage.com we offer thousands of oil drain plugs and seals to ensure that you can find the right plug for your vehicle. Replacing your oil drain plugs is a quick and easy way to stop most oil leaks. So save some oil and save some money at MicksGarage.com!