mactree2 wrote:...Well even though my oil pressure light never came on the dealership told me I had burned 4 quarts of oil. How is this even possible? Has anyone had luck getting Infiniti to accept responsibility for this problem? My car doesn't leak oil and burning 4 qts in 4k miles is not right...
Man, my heart breaks for fellow M45 owners every time this comes up. Search for "blown m45" on this forum and see what others have faced recently.
Unfortunately, I don't know of any resolution from Nissan beyond the engines whose excessive consumption (as determined by the dealer) was caught early and replaced while the cars were under some sort of warranty.
Were you driving aggressively to suddenly burn that much? See, like one of the early posters mentioned, when you take the car to the dealership they rarely track your consumption. It is possible that your car has been burning a considerable amount of oil but you just caught it after failure this time. IIRC one quart per 1000 miles would have qualified you for a replacement engine back in the day.
What can you do now? How bad is the knocking sound? Run a thicker oil in the engine to quiet it a little if you absolutely have to drive it (cheapest conventional oil you can find). That just buys you some time because an engine replacement or rebuild seems imminent... or sell the car if you don't want to deal with it. If you want to try and rebuild it, then stop driving iy to prevent further damage.