With my 2017 GDI engine Sonata and driving pattern requiring me to follow a severe schedule OCI (3,750 mile OCI) - why am I bothering with synthetic 5W30 D1 / Gen 2 oils that cost 50% more ? *Would there be any difference running Super Tech Synthetic D1 / Gen 2 5W30 ($17) against synthetic offerings from Mobil 1 , Pennzoil Platinum or Valvoline Advanced ($26) over the course of a 3,750 mile severe service schedule ? ... If I wanted to splurge , there is QSUD for $19 . Even if Warren oil company (Super Tech) has to qualify their 5W30 to BARELY meet D1 / Gen 2 specification requirements - would that oil not be good for at least a 3,750 mile severe service OCI ?
That Supertech oil I pass by every time I need a new oil change my have always been ideal for my severe schedule GDI engine needs ... If I was concerned with cleaning ability versus more expensive synthetic oils I mentioned - then I could add 5 oz. of Seafoam to the oil and run it for 100 miles before the next oil change to clean up the engine (debatable if even needed with Supertech Synthetic oil in the crankcase for only a 3,750 mile OCI) ... Your thoughts on above ?
That Supertech oil I pass by every time I need a new oil change my have always been ideal for my severe schedule GDI engine needs ... If I was concerned with cleaning ability versus more expensive synthetic oils I mentioned - then I could add 5 oz. of Seafoam to the oil and run it for 100 miles before the next oil change to clean up the engine (debatable if even needed with Supertech Synthetic oil in the crankcase for only a 3,750 mile OCI) ... Your thoughts on above ?