i used havoline 10w30,m1 5w30 and m1 10w30 in the 99 monte carlo that i gave my step-daughter and i would have too add a qt in between changes using the "chg oil soon" light which comes on around 4500+ miles. now,today when she came over i checked the oil level and it was still at the full level after over 2000 miles? so i asked her if she had to add any and she said no
. so i checked where i had recorded the oil/filter change and i had put some of my bogo stash of 10w30 pennzoil plat. in it
i'm likin that alot cause maybe now i want have too worry about the level in between visits as much