Oil Smell?

Good afternoon everyone. I have a 2018 Accord LX with Ktuner V1.2, PRL stage one intake, cone air filter, and I have had the catalytic converter gutted, it's gone. My concern is this: each time I complete a decently long drive, when I open my door, I smell oil. I can't distinguish if it is a burnt oil smell, or just a used oil smell. I cannot locate and leaks or drips, under the car or under the hood anywhere. My dipstick shows a normal oil level, and the oil is decent enough in color. Has anybody else had this issue? Any info or explanations would be wildly appreciated. Thanks in advanced!