I have a 2014 mkz hybrid I bought used with 11,000 miles. Car was a bye back but I was assured by the dealer it was non mechanical. Dealer has had car for about a month. Battery is being drained over

I would speak to the main dealership or even the manufacturer, who ever that might be.

There is no external fuel filter on this model, it's inside the tank mounted to the fuel pump, I think you should follow the mechanics advise and have the dealer look at it with all those codes in the computer, it may have gotten water in it.

The computer monitor the system and recognized a problem. After so many years and miles the battery may go bad and computer send a massage. Or something ales is bad. Hard to guess w/o scanning for code. stop buy to dealer or mechanic wit good scanner and read the code.

Hi,
If you do some more research you'll see that 1 Qt per 1K miles is considered acceptable, as the dealer stated....not that I agree either!

You may try replacing the PCV valve and ensuring the valves are adjusted properly.

Also, try a different oil - maybe a different weight may help.

I WOULD replace the O2 sensor as it can affect the amount of fuel that is used and may actually dilute the oil if it's getting past the rings.

Just to ensure the engine is healthy you can get a Compression and Leakdown test down. This will tell you the 'health' of the engine.

Go look on the Hyundai/Kia forums for oil consumption, too. You might come across something specific to your model.

GL,
Td

All Transmissions get the fluid changed at 30,000 miles

I really am not familliar with Hybrids,but if the Dealer
told you 70,000 miles,you can be rest assured that, that
is at the high end,mileage wise,as they usually tell you
that it never gets changed or changed at 100,000 miles

Both of which most trans fail long before ,along with
steering racks ,because of no fluid changes.

I'm guessing it takes special fluid

There are plenty of web sites to answer all
those questions any way you want.

I don't have a solution, only the same problem. I bought the MKZ Hybrid in February and have driven almost 1700 miles. I am good at watching the gauges and ensuring good fuel economy. But I have yet to get any thing above 32.6 mpg. Now it ranks at up to 36 on the highway and up to 41 around town. OK, I get the "UP to" but I bought a Prius and right off the bat, I was getting what the rankings were. It took me forever to get it past 24 mpg. Then just this past weekend the check engine light came on and stayed on. I have an appt to drop it off tomorrow.

Anyone else have this car and are you getting any better gas mileage???

I'm pretty sure that 4 weeks is within the the warranty period... If you think something is wrong with the battery power system don't hesitate to bring it in to your dealer. If you want to make sure they aren't BS-ing you, find an independent mechanic who works on hybrids, spend a little money, and have him just give it a preliminary look (no actual repairs) and ask him your questions once he sees the car. Then take that information to your dealer if he thinks something is wrong, so you'll have independent proof that there is an issue and they won't give you the "don't worry about it" run-around they do.\

Maybe you've been running at low speeds much more often and the battery has been running that whole time. When that happens the gas engine engages at lower speeds to take over for the battery as it charges. I would need to know more about your driving habits to assess the problem fully. Do you drive city miles a lot? Highway miles? about how many of each and how much time between the two?

it has to be under warranty, probably bumper to bumper for another 4 years. why on earth would someone solicit mechanical advice from shadetree mechanics when there are dealers with trained mechanics and all the computers and tools and goodies at their disposal? take it to a dealer.

Change the engine oil and call it a day. Your owners manual has service intervals listed, and with 11,000 miles, the only fluid I would pay attention to is the engine oil at this time.

Probably best for a second opinion. Did you purchase an extended warranty?