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Originally Posted by Jim Miller
Understood, can't predict in individual cases but was hoping someone would make me feel better about changing oil at 5000 miles and its payoff.
Anyone have statistics on the typical life of a 2.5 L engine?
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My impression is that the 2.5 lump is pretty sound by the standards of the M96 engine. There are quite a few known issues - porous blocks, liner failures etc. However, I believe these issues shake out pretty early on in terms of mileage. If your car is 50k+ on the clock, I think the risk of these issues cropping up is much reduced. The 2.5 also has the double-row IMS bearing, and I *think* doesn't score too highly in terms of bearing failure compared to other M96 lumps.
From reading around and looking at the mileage on cars for sale, etc, my anecdotal impression is that 150k isn't an unreasonable expectation for most well maintained 2.5s, especially if the thing has already done, say, 70k and is running well. I still think they can fail at any mileage. But if you've made it half way to 150k, I think it's much more likely than not you'll make the other half without catastrophic failure.