2022 Hyundai Tucson SEL: I'm hoping someone can help with the following statement in the vehicle manual:
This is for the base engine, a naturally aspirated inline 4 cylinder (Smartstream G 2.5 GDI). I was more than surprised to see this... Hyundai dealers are advertising this trim as using regular gasoline, as does fueleconomy.gov. This statement in the manual goes beyond the more typical "premium gasoline is recommended", as it implies premium gasoline is required. I called the dealer who told me premium was recommended only, not required, and they filled the vehicle with regular the day I purchased the vehicle. But the vehicle manual should hold the "truth". My plan is to go ahead and use premium for now - can anyone tell me if this statement is indeed correct? Should I be using premium gasoline? The base Sonata has the same engine with regular gasoline only in vehicle manual, though engine may be tuned differently?