I bought my car October of 2017. It had its normal issues and one was that it would need a few extra cranks when starting cold. Warmed up it was fine. I decided to refreshed the head recently and found 3 intake and all exhaust valves weren’t fully seated. Compression and leak down test will point you in the right direction but not all of us have access to these tools. After refreshing the head, these were all corrected.

-Longer crank on cold start
-Oil smells like fuel
-Loss of oil - I was losing 1qt every 1000-1500 miles of mixed driving with no visible smoke
-Could never get the car to idle at 14.7 no matter what I adjusted in link. Closest I got was 15.2