When doing an oil change, it is common practice to change the oil filter as well, but should you pre-fill the oil filter before you install it?

I was taught that you should always pre-fill the oil filter before installing it. However, there are conflicting opinions about this practice on the internet, so we decided to put this to the test. Let's find out if the oil out of the bottle is actually dirtier than the filtered oil going through the engine. Using SPEEDiagnostix to run ISO 4406 cleanliness tests, we measure the cleanliness of the oil right out of the drum and right out of the engine. As always, we are going to rely on the science instead of speculation!

If your oil filter is vertically or horizontally mounted, here's a Short that shows you how to prime the filter before firing the engine:    • Oil Change Hack For Vertically or Hor...  

To check out the previous video, here's the link:
Oil Change Video:    • AVOID the ONE MISTAKE Almost EVERYONE...  

For more from the Motor Oil Geek, check out    • Motor Oil & Lubrication  

For more about "Dyno" Don MacAskill, check out https://www.dynodonnymac.com

For more about Oil Analysis, check out: https://www.speediagnostix.com

I recommend Wix oil filters, which are available at https://amzn.to/41lNTSp

Who is the @themotoroilgeek? I'm a Society of Tribologists and Lubrication Engineers Certified Lubrication Specialist and Oil Monitoring Analyst (I've maintained both of those for over a decade). I also worked for Joe Gibbs Racing for 12 years as their lubricant specialist. During that time, we worked with Wix Filters (one of our sponsors) to test and develop filters for our race engines. We also worked with Lubrizol and Chevron-Phillips Chemical to test and develop oils for our race cars. Following that, I was the head of R&D for Driven Racing Oil. During that time, I formulated and tested over 50 products. We also worked with Cummins, Comp Cams, Oak Ridge National Labs and General Motors on various R&D products. Those efforts are recorded in peer reviewed white papers published by SAE International and ACS Sustainable Chemistry journals. I also own and operate SPEEDiagnostix, which provides used oil analysis.

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#oilchange #motoroil #oilfilter