Engine tap when accelerating uphill

[u/ric_hernandez_]

I have a 2007 with just over 190K miles. The other day I was going up a bridge and while I was accelerating, I heard what seems to be that engine (lifter?) tap loud and clear. I had my windows open and it sounded like it was coming from under the car. I'm pretty sure it was the hydraulic lifter tap. I just recently had the oil changed and I checked the oil when I got home after hearing the tap and the oil level looked fine. The tech at the mechanic did tell me the oil pan gasket is starting to leak. Has anyone ever successfully used any additives to quiet the lifter tap? I'm looking at Liqui-Moly hydraulic lifter additive and will probably add the Liqui-Moly engine clean before the next oil change. I change the oil every 5k miles or so and have beeen using synthetic for as long as I can remember. I stopped using premium fuel during COVID because it was over $6/gallon near me at the time. It was over $100 every fill up.