My 2019 CX5 takes 5.5 qts of oil. If I fill 4.5 qts my low oil light comes on. Anyone else have the same issue.

 

Dealing with a 2016 CX5 oil change today. My granddaughter bought this used CX5 last summer. It took 5 quarts and 8 ounces to refill after an oil change. But before I filled above the 4.8 quarts recommended for this 2.5 L engine, I verified the dipstick was the correct one with the dealer. 4.8 quarts had brought the oil level to the add mark on the dipstick and I wanted to understand why it was not full after adding the recommended 4.8 quarts. I happened to check the Rockauto.com parts page for oil for the CX5 and on this page it is noted that on a NEW CX5 it takes 5.7 quarts to fill but only 4.8 quarts for an oil change. So, it appears that 0.9 of a quart of old oil is usually left in the oil pan when changing. Looking at a photo of the oil pan on several different web pages, it appears there could be low areas in the pan that are below the drain plug. Also, the bottom of the drain plug is not flush with the bottom of the pan. I think it could be possible that if the front of the car is raised fairly high to access the bottom of the engine for the oil change, it could allow more of the used oil to drain from the oil pan than would drain if the car were level on a lift or level over an oil change pit. In that case it will take more oil to refill. At least that is what I am hoping since it took 5 quarts and 8 ounces to reach the full mark on this dipstick. Has anyone else noticed this?

 

Obviously, a half quart or so will remain in the oil lines and galleries of the engine. Puddling in various
areas also alter the amount retained in the engine. As my OCI method (ramps) helps drain the pan
a bit better than a hoist or similar (oil pit) alternative. I personally use an oversized filter so I just pour
a 5.4 qt. jug in and it ends up a very slight bit above the 'full' mark. Not a problem.
Most all engines can handle a 1/2 qt over fill. Some older engines would have no problem with a whole
quart over fill. Notice I said SLIGHTLY above the 'full' mark.
Of course, there is some variation between engines.

My 2¢

 

4.6 ltrs or 4.85qts is what they take after a oil change.

 

Yep, 4.8 is in the book. Grim_reaper, you don't feel raising the front of the car can drain more of the original 5.7 quarts (that Rockauto.com shows is needed in an original fill of a new car) than will drain when the car is flat on the ground or on a lift? I am looking for a good image of the oil pan showing the lower spots or the height of the drain plug above the bottom of the pan? Is there information out there stating that 0.9 quart of oil is left in the pan after draining for an oil change?

From Rockauto showing oil fill info. 5.7 quarts for a new CX5, 2.5L and 4.8 quarts for an oil change.

 

For the 2019 2.5L that the OP is asking about, 4.85 quarts barely goes over the MIN mark. When I finish pouring a 5 quart jug into my daughter's 2019 (non-turbo) , it doesn't even take the level to 1/2 way between the marks, and that's including pre-filling the oil filter with as much as it can take. An additional 1/2 quart is required to take it just under MAX, and all of this is exactly the same for our 2020 non-turbo as well. And this subject of written Mazda oil specs not matching the dipstick marks has been discussed multiple times on other Mazda forums, and is very well known to the DIY community on those sites.

I know you're a tech, and this is what the manual says, but that 4.85 number does not even come close to what the dipstick is saying. So unless Mazda sends out information that the dipsticks they're using have the wrong marks on them, that's what I'll continue to use to measure the amount of oil to refill.

 

LOL seems like this is a subject on a few MAZDA forums.
If you raise the front, you will drain more out of the pan. If the engine is warm or hot when changing the oil more will drain from the upper end of the engine to the pan, and you will drain a little more.
Really the important thing is to fill with at least 4.8 and then check and add until you have somewhere between the dip stick 2 holes. That is the design operating range for the proper oil level.
But depending on the forum you read the information on this subject and some internet information (read carefully how OEM service manuals or owner's manuals use their words) you can debate and argue the finer points of the measuring and what was the original intended oil quantity all day long. If you have had the oil pan off maybe I am sure more would be getting a chuckle about this thread and other's like

 

Thank you Callisto. In my 69 years I have never had a car that had this issue. All other cars and trucks filled right to the full mark on the dipstick with the specified amount of oil. None of those ever called for a for 4.8 quarts plus or minus whatever it takes to make it about full. Just don't want to overfill or leave it low enough to cause damage to my Granddaughter's new used car. I have researched and worried about this for 3 days so it helps that others have found this information. Thanks again.