So I said that after 2 tanks of techron, the pinging had disappeared. And it did, for a week. Now it comes back intermittently, and usually more subtly. I think it's relative to outside temperature. It wasn't noticeable on Wed with 90 F, but was on Thurs with 40 F.

Anyway, how many consecutive tanks can I fill with techron?

And when I change my oil later this week, will that get rid of the crud that's causing the occasional ping? Also, I'm gonna try the 0W40 instead of the 15W50 this time.

Thanks.

BennyM