I stopped by my Ram dealer to schedule an oil change for my 2021 Ram 5.7 and the service manager told me that I was lucky that the service wasn't for a ECO diesel because they had no oil filters for any Diesel engine vehicle. He went on to say that they were on back order with no estimated delivery date. The local Auto parts stores are all out of stock also. This is in Western Nevada near the California border. My brother in Law who is a service manager for a Ford dealership in Las Vegas said they cannot get bulk oil and had to buy oil by the quart locally to do oil changes. I hope that this situation gets fixed sooner than later.