Mixing oil weights

Bad thing is i have 5-20 in it now.
I used to use mobile 1 5-20 and I lost the #5 roller on the exhaust side. Many people were saying that the mobile wasn't a good oil to use, although I have ran it in most vehicles for the last 20 years I thought I would try the royal purple 5-20 as 8ve heard its a very good oil. Well it's getting changed out and I'm going back to mobile 1. I didn't even have a tick when the cam was setting my cyl 5 misfire and the roller was locked up.
The noise/tick started on the 3rd day after everything was replaced. I used the Mopar cam and phaser but no lifters were available so I had to go with sealed power which has good products.
I'm thinking about selling it this fall as i hate to say it but I'm very frustrated with the new Dodge or should I say Ram engineering. The lifter placement in this 5.7 is ridiculous as the oil has to struggle to lubricate the rollers and cam lobes.
Well thanks for everyone's opinion on what to do. Guess I'm going to try going back to mobile 1 5-20 full synth. Should have stayed with it in the first place as the royal purple was overpriced. Lol
Rod