Originally Posted by wdn
ACEA A5 is a requirement for the 2018 and is listed in the Hyundai owners manual here for the 2018 Hyundai Santa Fe Sport:
https://carmanuals2.com/hyundai/santa-fe-sport-2018-owner-s-manual-110929
Page 8-5 if you would care to check
Theta II 2.0 T-GDI
5.07 US qt. (4.8 l)
HYUNDAI approved engine oil ACEA A5 (or above)
So you are entitled to your opinion but those are the facts. If you want to keep the 100,000 mile warranty that is. The only time a manufacturer has to supply maintenance parts to you for free is if they say you must use their own brand. Hyundai is not saying you must use Hyundai brand oil -- they do say oil used in their engines must meet a spec determined by Hyundai. No different than any other car makers say oil used must meet some for their engines. Some like GM create their own spec.
If some of you guys want to play jailhouse lawyer and confuse the OP though go ahead. It's not my truck.
So, what is 'Hyundai approved' oil? Quaker State? And what weight? The chart shows everything from 5W-30 thru 20W-50 depending on the ambient temps? How many of THOSE are ACEA A5 (or above)?
"For better fuel economy, it is recommended to use the engine oil
of a viscosity grade SAE 5W-30 (API SM / ILSAC GF-4). However,
if the engine oil is not available in your state, select the proper
engine oil using the engine oil viscosity chart."
So, someone in AZ could run 20W-50 SM/GF-4 oil and be covered....
So, you are saying that I have to use a Hyundai Approved 5W-30 that is ACEA A5 (or above), and they recommend Quaker State[is that their approval?]. Show me a QS 5W-30 that is A5 (or above).
But wait, they recommend a 5W-30 that meets API SM/ILSAC GF-4, right. So does Rotella T6 Multi Vehicle 5W-30 qualify? But wait, that isn't A5 (or better).