WD-40 is safe. I've been using it for years but I usuallyt put some ATF oil in the engine afterwards. I mainly use WD-40 when I take the engine apart and clean or mod it.D 40 (Water Displacement 40th try) removes the water to aid in rust prevention, (rust is also a horrible lubricant) then lube stuff.
Tweet. The color of sputum or phlegm, which is the mucus and sometimes pus discharge expectorated from the respiratory tract, is often an indication of the type of respiratory disease that gives rise to sputum production.ith infections, the green sputum will be more purulent (large amounts of pus) while in non-infectious inflammatory conditions, the green sputum will be more mucoid (large amounts of mucus). 1  Pneumonia â white, yellow or green. 2  Lung abscess â green, sudden accumulation of large amount of sputum if the abscess ruptures.
Brown and Black Sputum. Brown or black sputum is an indication of âold bloodâ and the color may be due to the breakdown of red blood cells thereby releasing hemosiderin (from hemoglobin). Certain organic and non-organic dusts may also cause a brown to black discoloration of the sputum. 1  Chronic bronchitis â green, yellow, brown (infection).