quote:You gotta be kidding! I dont know anybody that drives a Corvette daily. Most are garage queens. 317000 miles is unreal, especially for the LS1 series engine.
Originally posted by buster: [QBIn fact there is someone with a C5 1999 Corvette with 317,000 miles on it! [/QB]
quote:This guy who owns that car even lives in Michigan! He's a salesman who is on the road all day long and just puts on Goodyear runflat snow tires in the winter and continues to drive unless there is more than about 8" of snow on the ground. He changes his oil every 5000 miles (far too often given his type of driving) with M1 5w30. The LS1 is a very durable engine actually, there are many of them out there now with over 100k on them and still run very strong. They've only been out since 97 in the Corvette, and 98 in the F-body, so in a few more years we'll start seeing more of them with over 200k on them. I'm getting a C5 Corvette in about 3 years and fully expect to get at least 400,000km out of it's original engine before it needs rebuilding.
Originally posted by RobWest:quote:You gotta be kidding! I dont know anybody that drives a Corvette daily. Most are garage queens. 317000 miles is unreal, especially for the LS1 series engine.
Originally posted by buster: In fact there is someone with a C5 1999 Corvette with 317,000 miles on it!
quote:There is no evidence which suggests the piston slappers don't last long though. I know a lot of guys who complain about piston slap, but don't know any of them who have needed an engine rebuild yet. The only LS1 owners in my car club that I know who have needed their LS1s rebuilt were those guys who did aftermarket heads and cam packages to their cars, and in those cases I suspect the engine builder just didn't put everything together properly (since both of these guys I know went to the same engine builder)
Originally posted by RobWest: So either you get an LS1 with piston slap or one that lasts forever? LOL
quote:My opinion is that it's all relative to the nature of the environment AND design AND materials within the engine. I think that ALL engines, if designed without a flaw, have "X" amount of life in them. Now, if every engine has "X" life in them, it's up to the envirenment / oil / maintenance / etc. given to it to extend it's life. My point, is I think every TYPE of engine has its own signature of WEAR metals just because it has different metalic parts in different quantity. Then, I also think every motor within the engine TYPE, has its own wear levels, although close. It's the SECOND or the individual motors wear that we need to TREND. There's already a so called "standard" of known wear metal levels that is BAD, no matter what engine youre in, but it needs refinement and adjustment etc, to get the MOST useful life. This is what I mean: "X" life would be if for instance we changed the oil every 500 miles or 1K or whatever. Anything OVER this number decreases the life of the motor, albeit VERY VERY little. Naturally "driving" conditions affect the issue and so does Quality of oil, and so does OCI. So, IMO as long as OIL burn is low, and oil is fairly clean (????), then it doesn't matter what the numbers are, as long as it doesn't go OUT of the TREND. But what if it does? And what happens if after say 300K or 350K or 400K or whatever the number, the motor shows signs of faster wear? Say two or three times before. If it starts wearing faster, but "well within" a good range, is this GOOD still, and is this the new trend? If this does happen, WHEN should it happen, at what mile ? And if this does happen, does this mean the motor is at "Z"% (????) of its useful life? Anyway, these are some of my vast things I think about EVERY DAY while working, it helps pass the time.
Originally posted by Baveux: -*-* Gm wearing faster or what ??? Geez I've seen lots of GM engine with lots of milleage
quote:Believe me, when I go looking for a Corvette, I'll be listening very closely to the engine on startup to see if it has piston slap. Even if the engine can still last long, it's a noise that I could not live with day in and day out, especially since the Corvette I do buy will be my daily driver. I went insane when I owned the 94 Grand Am GT which had a piston slapping 3.1 engine.
Originally posted by JohnBrowning: Patman just be real picky. Try to get an LS1 that does not knock on start up.
quote:agreed it is seams stupid that GM has not fixed it but I think they went to the short light weight piston to save gas, the government requires a certain average gas mileage from the fleet of cars sold (27.5 MPG, I don't know the light truck average) the consumers want power and safety. a fuel efficient little light weight car with a small engine gives neither, that puts a lot of pressure of the engineers to make compromises and piston mass is where a lot of energy is lost small changes in weight will make perceivable changes in power and efficiency my 8.1L has bad slap and has since 250 miles (few days after purchase) and oil consumption keeps is getting worse. I have not ruled out other possible causes of oil consumption yet but a portion is going past the rings weather it is all or just some I do not know In my opinion the consumer should have the final say in how efficient their car should be, let the manufacturer make the car consumer want, many people will be willing to drive a small no guts car to save $ at the pump but that should be their choice, not the governments
Originally posted by JohnBrowning: It is stupid and shorrt sited to let this whole oil consuption and knock issue persist. This engine is supposed to be good for the next 12-20 years (doubtful). If GM was smart they would add some deck height and push those rings down some. They would add some skirt to the piston and be done with this!