Not to mention what the dealer and oil change places tells you. Had my first service and had synthetic done for the change. Got in the car and the little reminder sticker they put on the windshield was for 3000 miles. If 7500 is considered normal for regular oil, I'm certainly not changing synthetic any sooner. The mindset of some has not changed since 1960,
Let me preface this with the facts that I am a Automotive Mechanical engineer, who worked in the automotive industry (Siemens VDO, Continental AG, Schrader, GKN, you name it) I was a quality engineer so all I did was perform root cause analysis and find out how warranty parts failed, conduct all the validation testing of new products trying to be released etc. I lived pre-mature failure my whole career. When you get a part replaced under warranty I'm the guy that figures out how and why it broke and who's fault is it. And do we have to recall millions of cars. Super stressful, and you only get problems every day. so I went into racing and became an engineer for the SHR nascar team and finally the US Haas Formula 1 team. I'm also a member of the SAE and happen to have partaken in reviews of oil companies products to see if they qualify for SAE approval. Not trying to brag at all, I hate it, just trying to let you know I didn't learn this on the internet.. lol
Now!! first off. The guys at oil change places are not ones you want to take advice from regarding oil technology, and engine technology.
The "Dealer" is not the Hyundai design and validation engineers. They push whatever they are told and will also ignore a lot if they think the customer won't like it. You cannot trust every word a service manger says..
In fact Hyundai themselves does not tell you to wait till 7500 miles.. They state in the manual and on the website that it can vary from anywhere between 3300 miles for heavy use, up to 7500 MAXIMUM.
Here's the skinny on oil. You can never ever change the oil "To much" the more you change it the less wear your engine will see. That's a fact. Once the car has been run and driven one time acids form and start to eat away (micro level here) at the bearings and seals, etc..You are not wasting any money.. is it necessary? Only Hyundai engineers know what the engine is capable of withstanding. But it can only be beneficial to the motor to have the cleanest newest oil in it At all times.
Synthetic and Dino oil work exactly the same and both work great. Synthetic oil does not lubricate better than Dino oil "per say" (but the additives and cleaners etc in the full synthetic premium oil make it better period) the main difference between Syn and Dino is that the Dino will break down and soon. I'm talking 5k max.. after that the motor will be seeing excessive wear on its components. You won't know the motor is until the engine spins a bearing years later.
But Syn oil does not loose its viscosity and lube properties really at all for a long time.. so running full Syn is a practice of preventative maintenance and risk prevention. You can run full Syn for 10k. But here's the question.. if someone came to you and said "hey man we gta change out your blood every so many days but it's all good cause we got some old out of date yet safe enough blood you can get every 3 months for $20 which could make your organs wear out faster, or for $25 more we'll give you this new latest tech super blood that will guarantee never prematurely wear your organs out and you'll live longer." Would you take the old blood?? I wouldn't.
Oil is the engines life blood, the newer and better it is the longer your engine will live. Period. If you don't keep a car past 100k than who cares? The guy after you will deal with the motor and pay for it.. lol but if you keep it to 200 or more, then you better take care of it.
Plus most of the dealers in the US don't even use the correct oil? Hyundai calls for a Shell Helix oil that we cannot get in the states.. if not that they call for a Quaker State Syn Blend.. Dealers are using regular Dino oil.. Not Hyundai's idea. Plus even full syn (albeit better than Dino due to the cleaners and additives I mentioned earlier) still gets dirty, picks up contaminates and is not as effective as clean new oil..Not to mention GDI engines now are much harder on oil because they run race car compression ratios and the high pressure injectors will get fuel blow by and contaminate your oil. No one with a GDI motor should use anything but full Syn and change it before 7500.
So long story short do you need to change your oil every 3k miles like grandpa taught everyone? No...unless you are in extreme conditions like high heat, lots of idling, stop and go traffic, and most of all turning the engine on and off multiple times. Almost all of the wear your engine recieves in its life occurs at start up.
Even then modern engines are much cleaner and you could push it to 4. But man even Hyundai says 3300 for heavy use? And that's with Shell oil you can't get or a syn blend cause Quaker state pays hyundai to recommend their oil and market it. Just like Benz has Mobil 1.
The dealer? He's just giving you the cheapest shit they can and semding you on your way. You think they care if their hurting your long term engine life?? No they want business?!! They want your stuff to break to either collect the warranty payout from Hyundai or rape you to pay for it all yourself?? It more profitable to treat illnesses then it is to cure them, remember that.
So bottom line is, you are not correct in stating it's a waste of money? Cause it certainly is not. You are risking your engine life to save maybe $100 bucks or so a year? You can get 5quarts of full syn for under $25 at Walmart..just a reccomendation.
