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Life Expectancy for the LS1

This is a discussion on Life Expectancy for the LS1 within the General Help forums, part of the LSx Technical Help Section category; My 2000 Z28 has 138K miles on it and it still is running strong. A mechanic I trusted told me ...

  1. #21
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    My 2000 Z28 has 138K miles on it and it still is running strong. A mechanic I trusted told me that the LS1s will easily last over 200K before needing any attention. I change my oil every 3K miles with Mobil 1 and use an AC PF61 long filter. I have developed a light knocking sound lately, particularly on acceleration, but I'm hoping this is piston slap and not a rod bearing.

  2. #22
    Moderator Firebirdjones's Avatar
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    Keep in mind, the catch can won't stop oil consumption if run inline with the PCV system, it just catches the oil before it re-enters through the intake manifold. The catch can is just a way of cleaning up the combustion process, which is a good thing. To add, the LS6 valley pan will only slow down the oil consumption since they repositioned the hose connection at the front of the engine (should have done that from the get go on all LS engines) but the vacuum will still pull some oil through.

    To eliminate the oil consumption completely Ron is talking about eliminating the PCV all together and venting the crankcase to atmosphere, just like cars used to do it before PCV's were mandated (about 1968 for most manufactures). This works great, however if you have visual inspections the smog police will have a fit

  3. #23
    Junior Member Mr99SS405's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    My T56 broke at 12,000 miles . It happens.
    mine was 13k miles in 99

  4. #24
    Member RONS98TA's Avatar
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    I know CALI is VERY strict when it comes to emissions so my catch can way may be a prob for you. Here in MD they dont even pop open your hood for emissions testing!! I think the way around that would be setting up your catch can like I was saying before, then hide the catch can in the fender like I did. Then I would put on "dummy" hoses to make it look as though the org set up from the factory was still there.

  5. #25
    Junior Member 98RedTA's Avatar
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    I've got 180k on mine and runs strong. A little oils leak but other than that nothing.
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  6. #26
    Moderator 98TransAmWs-6's Avatar
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    Quote Originally Posted by Firebirdjones View Post
    Keep in mind, the catch can won't stop oil consumption if run inline with the PCV system, it just catches the oil before it re-enters through the intake manifold. The catch can is just a way of cleaning up the combustion process, which is a good thing. To add, the LS6 valley pan will only slow down the oil consumption since they repositioned the hose connection at the front of the engine (should have done that from the get go on all LS engines) but the vacuum will still pull some oil through.

    To eliminate the oil consumption completely Ron is talking about eliminating the PCV all together and venting the crankcase to atmosphere, just like cars used to do it before PCV's were mandated (about 1968 for most manufactures). This works great, however if you have visual inspections the smog police will have a fit
    How would one do this? I have the ls6 pcv and catch can set up. Could you retain the catch can to prevent oil in my intake or would that be superfluous since deleting the pcv?
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  7. #27
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by 98TransAmWs-6 View Post
    How would one do this? I have the ls6 pcv and catch can set up. Could you retain the catch can to prevent oil in my intake or would that be superfluous since deleting the pcv?
    With an open breather setup there is no need for the catch can anymore. You are just venting the crank case at the valve covers to open air.

    The LS6 PCV and catch can setup works fine though. If you aren't catching all that much oil I wouldn't worry much about it. I run the stock PCV setup on my wifes camaro with a catch can, and after 3,000 miles it doesn't even catch enough to fill an aerosol can lid, not even a pint. So the loss isn't even measurable on the stick. The important thing is that you're keeping it out of the combustion process.

  8. #28
    Spaz is My Mentor SMWS6TA's Avatar
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    ^^That coincides with my LS6 PCV and Catch Can setup. I've gone through 4-5 oil changes and have gotten the same amount as FBJ stated. I will say that it has keep the LS6 intake much cleaner.

  9. #29
    Senior Member Whamhammer's Avatar
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    Quote Originally Posted by RONS98TA View Post
    This not only sucks oil from the engine, but will also lower your fuel octane rating from lets say (this is just an estimate for example) 93 to 90.
    Wait... what? How is a PCV mod' going to impact the octane rating?

  10. #30
    Moderator Firebirdjones's Avatar
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    What he is trying to say is that oil mixed with the combustion process delutes the fuel charge and kills power. It's difficult to even tune a car properly if it's using oil, it causes detonation, and in higher HP applications it's catastrophic, like when playing with nitrous for instance.

    Bottom line, excess oil in the combustion chamber is not a good thing.

  11. #31
    Member RONS98TA's Avatar
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    Thanks Firebirdjones, that clears it up. I guess I know what I wanna say, but don't always make it that clear on the screen.

  12. #32
    Moderator Firebirdjones's Avatar
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    You're welcome Ron. I don't always come accross on screen like I want either, and sometimes I'm taken the wrong way. But I knew exactly what you were talking about.

  13. #33
    Junior Member Oceanside78's Avatar
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    Hey guys, so I pulled my lid back to my TB and everything is pretty clean, no oil in the IM, does that mean it's pretty clean running? It's a full bolt on car, stock long block, 127K miles

  14. #34
    Senior Member Whamhammer's Avatar
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    Okay, gotcha. That makes sense.

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    I've had my Z since she had 50K on her. 1 quart low almost every oil change. Freaked me out the first time I saw it tho.

  16. #36
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