I have my 2018 Jeep Wrangler Sahara unlimited services at a dealer including an oil change. The dealer failed to refill the motor oil past 1.5-2 qts. Vehicle doesn’t have the same power it did before. Dealers cant diagnose a specific issue, so I can’t use my warranty. FCA won’t do anything because the dealer can’t find the issue. I can’t trade out because I’m upside down $7-10k. I feel I have exhausted my options, can anyone think of something I haven’t?