Originally Posted By: Ken2
Wemay, what is your goal? Do you want to run those engines for 300,000 miles? Maybe a higher quality oil is worth the money, and maybe not. Get a different car in 80,000 - 100,000 miles? No point in a different oil. What is the warranty on those? Currently Hyundai/Kia offers 10 years or 100,000 miles on the powertrain to the original owner, using the recommended oil and recommended oil drain intervals. If their money is backing that, that means something significant.
So, if you really want to upgrade the oil, use a top quality syn 10W-30 (in your climate) in the 2.4 for the full oil drain recommendation, and a top quality 5W-40 European-spec gasoline engine oil in the 2.0T for the full interval. Kendall, Pennz, and others make top 5W-40 and 0W-40 gas engine oils.
Or use the cheapest oil that adequately meets the spec and cut the drain intervals in half. If fuel dilution is your concern, a top oil and a cheap oil are equally poor when diluted.
Thanks Ken2,
No specific goal, just kicking the can around and getting other's opinions on HDEO and it's merits where it comes to these direct injection applications. I really have no issue with the Castrol currently coarsing thru the eingines though. My OCi is 4k for both so anything meeting spec will probably do. thanks for the advise. 10w30 for the 2.4 has always been an option since the car is also spec'd for it. But you are correct, 100K mile warranty is nothing to sneeze at. And if they are confident enougn with their spec of SM/GF-5, i should be too.