recommendation using 5w30 in lieu of 5w20
 

has anyone used 5w30 in 3.3l v-6 in summer time instead of 5w20?

What does the manual recommend? Personally I would go with the 5w-20 oil all year round. I don't know about Hyundai but Ford uses this oil in all their vehicles. I don't believe there is much difference in viscosity that it would break down in the hot summer months. And it would likely flow easier in the winter months.

My questions are, why are you asking and why do you want to change?

when motor is started in the morning, it runs fine...after driving for an hour the motor seems to have excess noise with the tappets ?

agree that in the winter months 5w20 is the way to go...during summer & hot weather a thicker viscosity would be better .

First, you need to find out why it's making noise. If it's making noise with 5w20 there is a probelm and it's not the oil. It should be fine on 5w20. Adding 5w30 is only masking the real problem and not fixing it.


20 years ago that was true but not so much today. Newer cars have smaller tolerances and don't need thicker oil and newer oil protects much better.

oil
 

both my santafe with the 3.3 2009 and my 2010 sonata run fine on the 5/20. and they are not noisey the new toyotas call for 0/20.

5w20 vs. 5w30
 

Thank you for the follow-up explanation. It does sound reasonable. :)

There shouldn't be any significant noise with the 5w-20 oil. That's an engine problem. The oil shouldn't be used to mask the problem. How many miles are on the engine?

If it were my car, I might want to hook up an oil gauge temporarily to see if the oil pressure drops substantially after it warms up. Perhaps you have a failing oil pump. I'd want to find out the cause for the noise.

I know this is an old thread but it worth mentioning that your Hyundai has a 100,000/10 year warranty on the drive train. As such, one should bring it to the dealer if it is making unusual noises.

Also, the manual (at least my 2012 Hyundai Elantra manual) specifically states 5w-20 and doesn't speak of 5W-30 at all. I would hate to give a dealer an excuse ("customer did not use the recommended motor oil") to void the long warranty and get off not paying for a warranty repair.

The other issue is changing your own oil. When you do so, you should keep a record and the receipts for the oil and filter, in the event you have a major engine problem, the dealer may want you to prove that the engine oil was changed at recommended intervals.