2008 Dipstick Level
 

The manual calls for 4.23 us qts for an oil & filter change. When i put in just over 4 qts the dipstick reads 1/4" over the full mark. Is the stick wrong or should I put in 4 qts. I do use a Hyundai filter & have been changing oil for over 35 years...

Pour initial oil fill close to full mark..... start engine for maybe 20 seconds, shut off engine,,, walk the long way around car, check oil.. fill oil to full mark and drive on.

Right, the oil you poured in hasn't been pumped to and through the oil filter yet. Start the car, run it for a minute or so and then shut it off for a few minutes. Then check again. Also, be sure to check on level ground.

I tired to explain that I've been working on cars for over 35 years...that being said, I google this and there is problem with the owners manual. 4.23 qts. is wrong...3.75-4.0 qts will work...

I don't know where you are getting your info but the Hyundai Service website clearly lists the 2008 Elantra as having:
Total Capacity = 4.33 US qts
Oil Pan Capacity = 3.91 US qts
Drain and refill including oil filter = 4.23 US qts

The owners manual is correct. The older (2001-2002) models had a TSB about incorrect levels but that was the XD model, not the HD model you have.

Once again...if you put in 4.23 qts. you are 1/4" over...I also called Hyundai service dept. and they said they put in 4 qts only...so much for the website & manual...and my google search has users putting in 3.75-4.0 qts...

Gotta love them production variations of pan rail height stacked onto block rail height, and diptick tube depth into the block, and stick into the yellow handle depth, I see of ton of varioations as to how much oil is dumped into engine to make the FULL dot on the dipstick.

As you were ......