Has anyone used these lifters ?

To add to the discussion, I had a new 340 Duster. After first oil change I used Castrol GTX and I had lifter bleed down like you're talking about because I didn't use the car every day. I swithched to Quaker state and had no more lifter bleed down. Of course this is 48 years ago when oil had Zinc in it. Maybe a different oil might solve your problem.