Just did 6 mo, 2900mi on my Ford problematic GDI just driven mainly in town short trips. It only went that far due to the QS10W30 FS I was running.
Switched to 5w20 for Winter. Big mistake. Engine sounds like a bucket of parts rattling around in just 2-1/2 months.
This engine is shot IMHO. May just be VVT but could be piston skirt or rod bearing as it get noisey as you unload the engine when revving it in Neutral or manually shifting the autobox in S mode.
I do NOT intend to go to the dealer for repairs and get a BIG Black Mark on the stupid carfax report - unless it blows on the road.
On the wife's old 2017 subaru crosstrek (a P.I motor) went 5 month and 9300 miles on a Valvoline / Magnetech mixture.
Oil came out looking fantastic for miles accrued UOA showed nothing wrong whatsoever. BUT! She does a LOT of high speed highway with regular hour long one-way drivetimes.
Chris you have been agonizing about that Hyundai for over a year. I think its time we dump both of our cars.
The grass is always greener
I am waithing for a classic B or C body 2dr HT or a stupid camaro v8 LT-1