Max Milage?
Max Milage? Does anybody know how long a LS1 can go before starting to lose substantial amounts of power? Like before the engine needs a rebuild, im talking just engine here, not whether the transmission or electrical, like a/c or lights stop working but the engine. Thanks 
TECH Fanatic
Joined: Aug 2004
Posts: 1,326
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From: NW Houston/Nacogdoches, Texas
I am in the market for an ls1 and have been brooding over the same thing. I think, all-in-all, the best bet would be to give the car up at around 150k. Chances are you are probably loosing some power and overall oomf and reliabilty. I would look into another car at that point or look into a new rotating assembly (forged... 
). Or you could get a rebuild...but I think for a little more you could get all new, better stuff. Ls1's are beasts and I have heard of some that have been running for a loooong time. I've posted up asking similar questions and offering my answers, so check out these threads, they might help you out.
https://ls1tech.com/forums/new-ls1-owners-newbie-tech/210023-big-decision-ls1-lt1.html
https://ls1tech.com/forums/new-ls1-owners-newbie-tech/210270-engine-holds-high-mileage-better-ls1-lt1.html
https://ls1tech.com/forums/new-ls1-owners-newbie-tech/229319-opinions-high-mile-1998-ls1.html
https://ls1tech.com/forums/new-ls1-owners-newbie-tech/227569-what-mileage-stay-away.html
). Or you could get a rebuild...but I think for a little more you could get all new, better stuff. Ls1's are beasts and I have heard of some that have been running for a loooong time. I've posted up asking similar questions and offering my answers, so check out these threads, they might help you out.https://ls1tech.com/forums/new-ls1-owners-newbie-tech/210023-big-decision-ls1-lt1.html
https://ls1tech.com/forums/new-ls1-owners-newbie-tech/210270-engine-holds-high-mileage-better-ls1-lt1.html
https://ls1tech.com/forums/new-ls1-owners-newbie-tech/229319-opinions-high-mile-1998-ls1.html
https://ls1tech.com/forums/new-ls1-owners-newbie-tech/227569-what-mileage-stay-away.html
