Ran a first test on my wife's car with 20k total miles. I've changed every 5k miles. 1st change was Valvoline advanced, 2nd change was Supertech (can't remember if it was 10k or 20k), 3rd change Kirkland. New fill I mixed 3.5qts of Kirkland and 3.5qts of Pennzoil Platinum to use up what I had left on hand.
This UOA is 100% Kirkland 5W30. My first DI only engine so I was worried about fuel dilution but it looks like everything is holding up well. I will continue with 5k intervals. Hyundai oil specs aren't the most clear so I've been using whatever is on sale in current API spec. If anyone has recommendations for this Atkinson cycle GDI 3.8L Lambda engine I'm not tied to anything in particular.
This UOA is 100% Kirkland 5W30. My first DI only engine so I was worried about fuel dilution but it looks like everything is holding up well. I will continue with 5k intervals. Hyundai oil specs aren't the most clear so I've been using whatever is on sale in current API spec. If anyone has recommendations for this Atkinson cycle GDI 3.8L Lambda engine I'm not tied to anything in particular.
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