Quote:
Originally Posted by olinjohnston
Not only is the oil level monitored constantly, the functionality of the sensor itself is too...So if there is a fault with the measuring sensor, you will see a warning telling you to have it checked. The car will let you know to add a quart of oil before it gets to the absolute minimum, but you can check it periodically if you're the type who likes to keep it topped off. In addition to the convenience of checking the oil from the driver's seat more precisely than a dipstick, the oil level sensor will even warn you if it is overfilled.
Originally, I was critical of these systems too (at least without the backup of a mechanical dipstick) but they have proven to work well, promote more frequent checking of the oil, and are reasonably low-risk/reliable. If your fuel gauge fails to read accurately, for example, there is no such monitoring to warn you like the oil level sensor has.
Even still, the warranty would cover a replacement engine if it seized due to lack of oil caused by failure of the sensor AND the failure of the diagnostics of the sensor AND the fact that you would only be around a quart low by your next service visit anyway...point is: Don't worry about it.
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Thanks Olin VERY helpful and informative. And thanks to OC40 and Sedan as well.