What kind of Synthetic Motor Oil?
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Originally Posted by thefirebirdman
Mobile 1...fixing to change the tranny and rear end fluid for the 1st time....need to read and see what folks are using for that....
I thought you guys would be using something a little thicker due to the weak valvetrain of the LS1? I was going to go with castrol 10-40, I used that and 10-30 and in my vette. Should I go to mobil 1? Any reason why? Or why the 5-30? Thanks, I am getting ready to change all the fluids in my car and a full tune up, just bought it!
Originally Posted by Patman
The three synthetic oils I recommend for the LS1 are German made Castrol Syntec 0w30, Redline 5w30 or Amsoil 5w30 or 0w30.
TECH Senior Member
Joined: Nov 2001
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From: Mississauga, Ontario
Originally Posted by Fulton 1
Patman, out of curiosty why not RL 10w30 anymore?
So the 10w30 can work very well, however if you start up in any temperatures below about 40F, you will benefit more from a 5w30 or 0w30 viscosity. And these oils are made with little or no viscosity index improvers, so there is no problem using them in the heat of summer, since these oils won't thin out.
Originally Posted by Patman
Redline 10w30 is definitely very good, but to be totally honest, I see 10w30 synthetics being somewhat obsolete now when a 5w30 or 0w30 can do all the same things plus have the better flow when cold.
So the 10w30 can work very well, however if you start up in any temperatures below about 40F, you will benefit more from a 5w30 or 0w30 viscosity. And these oils are made with little or no viscosity index improvers, so there is no problem using them in the heat of summer, since these oils won't thin out.
So the 10w30 can work very well, however if you start up in any temperatures below about 40F, you will benefit more from a 5w30 or 0w30 viscosity. And these oils are made with little or no viscosity index improvers, so there is no problem using them in the heat of summer, since these oils won't thin out.