Yes, combining synthetic and conventional motor oil is safe. Regular oil can prevent synthetic oil from operating to its full potential if you do mix the two types of oil....
Yes, it is possible to add oil to a hot engine, but you should only do this if you are topping off your oil. When doing that, though, you must exercise extreme caution....
You don't need to use a sharpening stone to sharpen a knife; you can simply use any stone. Aluminum foil, scissors, and sharpened knives are additional options....
Glass doesn't alter its appearance and appears the same whether it is hot or cold. Depending on the temperature and pressure, it responds differently....
A radial patch can take 20 to 30 minutes to patch a tire, but installing a plug only takes a few minutes and is typically possible while the tire is still attached to the...