Can I please get some advise. I blew up my last motor and will shortly have a brand new one (Stock OEM LS7). The last motor had 87K miles (3.5 years old). The car is a daily driver (2 cold starts every day). I also take it to HPDE single day track events about 10 times a year. The car lives in southern california.
There is a body of thought that LS7 motors are failing due to broken exhaust valves. And this is caused by a premature wearing of the valve guides. Which in turn leads to fatigue in the valve and the valve head breaks. So a better suited oil might address this problem if it can better lubricate the valve stem and guide. Not sure if ZDDP helps with this particular issue.
I used Mobil1 5w30 on last motor and am considering changing.
I have heard from other sources that you want to stick with a 5w or 0w for a daily driven car. It is also typically suggested to run a 40w for the track. And since Mobil1 0w40 has higher ZDDP than the 0w30 and is actually put in the same motor/car in Europe by GM this is the most likely candidate.
But I have read hear before that any 0w40 will break down quicker than a 10w30. Also some believe that you should never have over w30 in these engines due to clearance tollerances. So I am looking at something like the Amsoil Z-Rod (or a Redline similar oil) with its higher ZDDP than the Mobil1.
I am torn between the different opinions I hear and am asking for advise.
Thanks
DH
There is a body of thought that LS7 motors are failing due to broken exhaust valves. And this is caused by a premature wearing of the valve guides. Which in turn leads to fatigue in the valve and the valve head breaks. So a better suited oil might address this problem if it can better lubricate the valve stem and guide. Not sure if ZDDP helps with this particular issue.
I used Mobil1 5w30 on last motor and am considering changing.
I have heard from other sources that you want to stick with a 5w or 0w for a daily driven car. It is also typically suggested to run a 40w for the track. And since Mobil1 0w40 has higher ZDDP than the 0w30 and is actually put in the same motor/car in Europe by GM this is the most likely candidate.
But I have read hear before that any 0w40 will break down quicker than a 10w30. Also some believe that you should never have over w30 in these engines due to clearance tollerances. So I am looking at something like the Amsoil Z-Rod (or a Redline similar oil) with its higher ZDDP than the Mobil1.
I am torn between the different opinions I hear and am asking for advise.
Thanks
DH