I think you have some misconceptions in your head about oil, but I'm hesitant to dig into it because these conversations always spiral downwards the same way.
I'm guilty of using terminology like "thinner" or "thicker" when referring to viscosity because other normal people understand the idea I'm trying to convey better, but technically speaking there is no such things as "thick" or "thin" oils in any given weight. The viscosity is the viscosity, period (*for a given temperature). 10W-30 synthetic is not "thinner" than 10W-30 conventional. These are just misnomers we say to one another to try to simplify the explanation of a more complicated idea.
The superstitions about synthetic oil are perpetuated by simple misunderstandings and incorrect correlations people made years and years ago after changing oil type and discovering a slow seepage or leak, but we're talking about much older cars here with much less precise tolerances on average where these misunderstandings came from. It's apples and oranges when people try to apply these old fables to modern engines.
"Switching to synthetic oil" (which in your case is not actually a switch at all because thats what was already in there from the factory) does not cause leaks or bring on oil burning. Thats just an old urban myth.
There is no mineral oil or special break-in oil in these cheap mass produced FCA engines.
There is lots of good resources to learn all about engine oil on the internet if a person has time to kill but the gist of it is very, very simple. All a normal person needs to remember is:
- You should always use full-synthetic oil in anything modern and nice that you care about.
- You should always use the viscosity of oil specified by the manufacturer in the owner's manual.
- You should never put extra friction modifiers or magic potions in with your oil.
- Change your oil and filter on a reasonable schedule that is within the car manufacturer and oil producer's guidelines.
Thats truly all there is to it. But I might add:
- There is no engine oil leak or oil burning problem that can be legitimately "cured" by changing oil viscosity or by adding any magic potions.
That is simply not a valid solution, even if it temporarily appears
to have the desired effect. Anybody who claims to have cured an engine oil leak by switching to a higher viscosity oil is lying to you and to themselves, they just don't realize it. I'm not saying a minor oil leak might not appear to stop or slow down after changing oil, that can happen, but its not because of "thicker" oil.