API SP for Kia or current SM?
Hi, I have 2016 Kia Optima LX GDI engine 2.4 naturally aspirated. The oil for KIA is API SM, but I see that these type of engines need to avoid the carbon in order to perform well. API SM is old school isn't it, why would they still put that to GDI engines. Shouldn't it be better to put API SN, Sn+ or even the new SP. I would appreciate your thoughts on this.
Thanks!
Any comments on this one?
If it is under warranty, use what they recommend. Hyundai/Kia love voiding warranty claims, so don't give them a reason.
Thanks for your response!
You're welcome
I believe Hyundai/Kia recommend using CRC Intake Valve cleaner every 30K miles or so. I have a friend with a 2015 Sonata with the 2.4L naturally aspirated engine, and she's been using that since the car was new with no issues (it now has 70K miles). I would try using the new GF-6 engine oil with with the recommended oil weight it says in the owner's manual - the GF-6 oil is meant for GDI engines.
Thanks I was thinking on that (Changing to SP). The only thing is that the car is still under warranty. I asked the dealer but they haven't responded by, I am pretty sure they will say. THATS THE OIL THE MANUFACTURER RECOMMENDS (API SM). But doing the CRC or Lucas valve cleaner would be my choice.