Originally Posted by Dunecrawler
BTW, I complained to Chrysler about the oil issue and told them that I was invoiced for 5W40 and Jeep service said that was all they used.
Chrysler's answer was that the invoice must be wrong. I told them that the service center confirmed they used 5W40, but they insisted that was not possible as it is clearly stated to use 5W20, so the invoice must be wrong...
That sounds pretty shady to me. If the manual states a certain grade, that should be used regardless of anything else.
But, I really don't care what oil they put in there, as long as everything still works. As long as the dealer changes the oil, it keeps the warranty. If you still have the warranty, they have to fix the issues.
I know a few people that change their own oil and dealers around here have voided warranties because of that, even though the owners had receipts showing that they used the correct oil. The dealers said they cannot prove that that was the oil that was used in the vehicle.
If I have a car under warranty, I always let the dealer change it so it is on record that they did the work and if something fails it is on them, not me.