This filter was in service on my 4.2L Vortec L6 for 9,427 miles and changed when required by the OLM. The oil used with this filter at the time was 76 Pure Synthetic 5W-40. I switched to their XP synthetic media filter when I started using Mobil 1 0W-40 not that long ago.
I am rather impressed with the construction and quality of the 51522. Any solid particles you see were probably deposited by 1 liter of Liqui Moly Pro-Line Engine Flush, run for 25 minutes. Any metal particles you see will be there from the filter casing, it was quite a job cutting it open with the Dremel tool.
I am rather impressed with the construction and quality of the 51522. Any solid particles you see were probably deposited by 1 liter of Liqui Moly Pro-Line Engine Flush, run for 25 minutes. Any metal particles you see will be there from the filter casing, it was quite a job cutting it open with the Dremel tool.