Engine damage caused by dust and dirt ingression through a damaged or poor air filter
A good maintenance plan requires more than a good oil. Here we see what happens when you use an air compressor to clean an air filter or use a filter that does not stop the dust from entering the engine.
The driver of this first SUV said he was very careful about cleaning his air filter. You can see that the damage to the engine in 6500 km is the equivalent of more than 250,000 kilometers of normal driving.
In a normal oil analysis, the aluminum would be about 1/3 of the value of the silicon (dirt) due to the normal composition of the dust particles. Anything over this is aluminum wear from the block or other aluminum surfaces.
The 325 ppm of dirt caused 991 ppm of wear in the cylinders and other parts, as well as 72 ppm in chrome parts. This represents close to 400,000 km of normal use in these condicionts or 800,000 km of use in paved roads under the best of conditions. This oil was only in the pickup 3000 km (about 1800 miles)
The cylinder wear of 135 ppm caused by 49 ppm of dirt is about 4 times normal, or 6 times what good maintenance would be. In 10,000 kilometers it has got 40,000 to 60,000 km of wear.
Este caso es un camión utilizado para rutas nacionales de larga distancia. El chofer también cree que se debería soplar el filtro de aire con aire comprimido para mantenerlo limpio y dar más fuerza al motor.
Note that this oil (Argentine Repsol) sheared down from a 15W-40 to a 15W-30, reducing the protection in the bearings and valve train.