VTSSDUDE
Active Member
- Joined
- Feb 29, 2004
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- Location
- NSW, Australia
- Members Ride
- VT SS 5.7L Commodore.
LS1 and even LS2 run the same bearing tolerances as the sames as older engines. So using a 50grade oil in them isn't going to hurt them. I use 50 grade in my VT SS LS1 and VE SSV. No problems, I couldn't run anything less, might as well put sewing machine oil in your engine. At operation temperature 60 grade is really the only grade that can keep up the 100 c viscosity. It is about keeping the film strength between the metal surfaces so they don't touch. 30 grade just won't be as great as 50 grade or higher.
My LS1 has the same problem has yours, at running temp the lifter noise travels right down the exhaust and echos. Come to think of it though, I haven't heard them in the last couple of months. I wouldn't worry too much about it. My VE SSV has it too, but it is very faint. How the LSx engines are. They are combustion engines, you can't expect them to be too quiet
My LS1 has the same problem has yours, at running temp the lifter noise travels right down the exhaust and echos. Come to think of it though, I haven't heard them in the last couple of months. I wouldn't worry too much about it. My VE SSV has it too, but it is very faint. How the LSx engines are. They are combustion engines, you can't expect them to be too quiet