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We have seen some of this with the 2.3L NA engines, but rarely with the 2.0 turbos. Any ideas?
Any idea what these folks were running for engine oil that is oxidized and turned to jello? When this happens, the engine will get trashed with or without the sensor failing. This also suggest that the oil sludging make the pressure sensor fail somehow too. Severe wear produces a lot of micron sized metal particles that is thought to act as a oxidization calalyst. A run-a-way situation.
For the 2.3L NA engines I have been trying to get folks to use Mobil One 10W30 or a xW40 oil as there have been timing and balance chain failures too. So there is something strange going on. I am thinking that a true synthetic will not sludge up. A group III oil should be able to hack it, but there is something going on in the 2.3L: engines that is not anticipated in the oil testing spec's where the group III oils seem at face value seem to offer the performance of a group IV or group V base stock. Just because two different types of oils meet the same spec, that does not mean that there will not be pronouced differences when things are extreme.
I find that Mobil Delvac One, only comes as a 5W40, makes my 95SET run quieter and smoother than Mobil One 10W30. So with 144000 miles that tells me that the perhaps the mature running clearances of older engines need a different oil than the holy 10W30 grail that the API pushes. And this oil also increased my gas milage. I use LESS fuel than before. So there is more to the picture than viscous losses. The Delvac One oil is reducing friction and I am quite confident that this means reduced wear as well.
Back to the failures. Neglect and cheap oil keeps coming to mind.
posted by 65.68.100...
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