Disconcerting valve clatter or ping!!

[helm]

You didn't mention what octane fuel you use...but didn't the non VANOS M50 require premium (91 AKI)? And if you've been using 87 AKI (since fuel prices have soared) the "pinging" may be from early detonation...and may be resolved by using the recommended fuel requirement.

Thank you, for the comments. Yes I am using premium as recommended.

Maintance Manual suggest 20W50 in the summer. I would think that Mobil 1 Syn at 15W50 would run thinner or lighter in any event and should be good into the fall, here in Canada. Wouldn't M-1 0W40 be too broad a range and too light for this old car? Maybe OK in the winter at -30 F!

The clattering/pinging is disconcerting, maybe just have to keep the revs up!!

[632 Regal]

Okay but a LOT of people are running it even in texas! Read up on here about engine noises going away with the stuff.

Just trying to help.

Maintance Manual suggest 20W50 in the summer. I would think that Mobil 1 Syn at 15W50 would run thinner or lighter in any event and should be good into the fall, here in Canada. Wouldn't M-1 0W40 be too broad a range and too light for this old car? Maybe OK in the winter at -30 F!

[helm]

Okay but a LOT of people are running it even in texas! Read up on here about engine noises going away with the stuff.

Just trying to help.

Thank you!
Helm