Is it normal for a new car's windshield to have an oil film?
2 Answers
Under normal circumstances, the oil film on a 2-month-old new car should not be very severe. Here is detailed information about automotive oil films: 1. Wall-attached oil film: During cold starts, the engine speed is low, resulting in reduced air intake. The mixture density in the cylinder is lower, and factors such as turbulence level, uniformity of the mixture, cylinder wall temperature, and the temperature and pressure of the mixture at the end of compression are all relatively low, leading to poorer fuel evaporation. A significant portion of the fuel remains as an oil film on the intake tract walls, intake valves, and cylinder walls. 2. Others: The removal of old paint films can be done entirely or partially, depending on the extent of damage to the old paint film and the quality requirements for the new coating. For partial removal, the damaged areas can be addressed. Common methods for removing old paint films include manual paint removal, mechanical paint removal, and chemical paint removal, which are the most frequently used methods.
It's quite common for new car glass to have an oily film. I noticed a slippery film on the windshield right after picking up my new car. It seems to be a protective coating applied by the manufacturer for transportation and storage, which is perfectly normal as it helps prevent dust and scratches. Over time, the oily film may gradually fade or disappear. However, if you experience blurred vision during rain or excessive glare from lights at night, it could affect driving safety, so it's best to address it promptly. I recommend using a dedicated automotive glass cleaner for a quick wipe—avoid household detergents as they can leave more residue. Remember, regularly checking the cleanliness of your glass is one of the fundamental habits for safe driving, preventing last-minute panic in unexpected situations.
