How to Distinguish Good and Bad Engine Oil?

[McPaislee]

Methods to distinguish good and bad engine oil: 1. Observe the color of the oil. Imported engine oil is golden with a slight blue tint, crystal clear and transparent. Genuine bulk engine oil is mostly light blue with a bright luster and flows evenly. 2. Smell the oil. Qualified engine oil has no peculiar smell and is slightly aromatic. If the gasoline performance is relatively mild, but there is a strong irritating smell, especially a heavy fuel smell, it is likely to be recycled oil. 3. Check with the dipstick. Pull out the oil dipstick and observe the scale lines against a bright light. If the scale lines are not clearly visible through the oil on the dipstick, it means the oil is too dirty and needs to be replaced immediately. 4. Rub and feel the oil. Take a small amount of oil from the oil pan and rub it between your fingers. If it feels sticky and forms threads, it means the oil has not deteriorated and can still be used. Otherwise, it should be replaced.