Which ACEA spec oil are you (your dealer) using?
I've seen in the user manual for my Hybrid that ACEA A5/B5 oil is recommended, however, having just had my first service, a quick glance at the invoice shows that they used ACEA C3. They also gave me ACEA C3 oil with the car in the delivery pack. The main difference between the two specifications is the high-temperature high-shear viscosity at 150 C which has to be between 2.9 cP and 3.5 cP for A5 and >3.5 cP for C3.
Now, here's the interesting bit: my fuel economy average is around 5 L/100 km. I do not drive the car hard, but I have the following mitigating factors: 95E10 fuel, 17" wheels, Michelin Primacy 3 tyres (not energy saver). So I start to wonder whether the C3 grade oil is also a contributing factor to the fuel economy that I'm seeing. Having said that, in the last week I'm getting 4.5 l/100 km now that the average temperatures are between 10 and 20 C.
So here's the question, which spec oil are you/your dealer using with your ioniq?
PS I'm using SAE 5w30, but I didn't want to complicate the poll further.
2018 Hybrid Executive (Fiery Red)
Last edited by SynthSam; 18-05-19 at 06:27 PM.