Clark,
Several months ago I bought a 2006 Buick Lucerne with the N* engine. It had 78000 miles and the previous .owner admitted to a little engine oil seepage. I went from Jiffy Lube bulk 5w30 changes to a 10w30 HM oil and the seepage has slowed down. If it continues I may go to a 10w40 HM oil.
I love the ride comfort and the power of the engine. So far so good.
Several months ago I bought a 2006 Buick Lucerne with the N* engine. It had 78000 miles and the previous .owner admitted to a little engine oil seepage. I went from Jiffy Lube bulk 5w30 changes to a 10w30 HM oil and the seepage has slowed down. If it continues I may go to a 10w40 HM oil.
I love the ride comfort and the power of the engine. So far so good.