i know what ya mean. I could never convince myself that the real-time reading business was actually working.

 

To the OP, if it was serviced at the dealer it is unlikely that it is overfilled by more than 1/2 qt and that should be a non-issue. Also know that the readings are very sensitive to level ground. A slope of just a couple degrees can cause an overfill warning so make sure it's on very level ground when you check it.

As others have stated, a Mighty-Vac is a good investment anyway but if you want peace of mind, you can buy one and extract a 1/2 qt yourself and then recheck the reading and see if it has gone done below the red line. I had to do that for the first oil change on mine as well.

As for oil level, I always check mine when the car is stone cold. All the oil is in the pan and I get very accurate readings. The manual says shut the car off and wait 10 minutes because from a service perspective if you bring a car into a dealership for an oil change they can't wait for the car to be stone cold to check the oil level. The engineers have deduced that waiting 10 minutes will get the vast majority of the oil back in the pan so that waiting longer than that won't appreciably collect any additional oil enough to change the reading, which is a manageable wait time in a dealership. I'd rather know the oil level *before* I start the engine, not after I've warmed it up, in case it is low, and that is why I will check it when I first get in the car. Press the ignition on, don't start it, and check the level when it's cold. Mine always reads right up to the full line, but not over.

 

Works great if your garage has a flat surface. Mine is inclined.

 

Mine doesn't let me check oil level unless engine is warm and has been off >10mins.
I got my oil level perfect on a level surface, then captured a photo of the displayed level on my slightly inclined driveway. I marked the location for index wheel chokes. Results have been repeatable. I double checked with my scan tool as it shows measured oil level anytime.
This from the Repair Manual
"If the message Engine Oil Level Engine Oil Level Overfilled: Overfilled is displayed, seek qualified assistance immediately. Do not drive the vehicle as this will cause serious damage to the engine."

Electronic Dipstick Service Operation to be verified, a service mode exists to give access to live oil level readings. In order to have a correct reading, the following conditions must be met:
The vehicle MUST be parked on a level area of ground. The sensor installation is very sensitive to vehicle tilt in the for-aft direction: ½ degree vehicle tilt corresponds to up to 0.5L measurement error. The gear selector must be in the PARK position, and the BONNET must be OPEN
A minimum time of 10 minutes must be allowed to pass after running the engine. This drain down time is to allow the oil to return to the sump. Use of the eDipstick within this time WILL give an incorrect output.
To access the live oil level display, the following procedure should be followed:
Scroll through the Message Centre, using the LH directional controls on the steering wheel, to access the eDipstick display via:
MENU > VEHICLE INFO > OIL LEVEL DISPLAY
Press the cruise control CANCEL button twice within 2 seconds.
The graphic now corresponds to the LIVE value.
The service mode displays the correct live reading. This is to be used during the PDI procedure, and after an oil change.

Mine was overfilled by the Seller's Tech. I measured 2L overfill. I don't think engine damage occurred. I had some misfires, 5 oily plugs, and a failed in-Warranty CAT. All was corrected by oil level.

 

Hmm. That’s interesting. Maybe the new cars allow for checking with cold oil compared to the older cars. Must be the case based on what Thunderdump is saying.

 

Nup, my 2014 F-Type has always allowed me to check the oil cold. In fact that is the only way I have checked it for many years now, first thing in the morning after sitting overnight. I don't think this has changed at all for the entire life of the F-Type.

 

+1
Picked up a 20L conteiner of JLR approved Castrol C5 0w20 online ahead of the price increases due to the conflicts in the Middle East which will give me almost 3 changes for about £65 (US$90) each including filter using an extractor.
​​That's 1/4 of the price charged by my JLR specialist. It takes 10min and you know exactly how much is coming out and going back in.

 

I use the Jag oil change procedure, which has you run the engine for 10 minutes after refilling, then off for 10 minutes and check the level.

Since I top it off with the oil hot, I try to check the level when it’s hot. My car is due for an oil change, and I checked the level after sitting overnight. It showed down 1/2 liter (halfway between the top and bottom lines - I think that span is 1 liter.) Then I checked it 10 minutes after a drive, and it showed only down 1/4 liter.

So I recommend being consistent - if you top it off cold, then measure it later cold for consistency.

Oil change procedure (like most here, I use a MityVac instead of the drain plug)
https://www.dropbox.com/scl/fi/wrsql...=4i5058r8&dl=0

 

Mine is a 17 m/y, in the US.
Cold oil level would be good. So would remote start and window close.

 

I can’t help with remote start, but the SmartTop controller lets you operate roof and/or windows with the fob. Many of us here recommend that.
https://www.mods4cars.com/sms/db/smarttop/

 

This is the key. I did something similar to your check when I had my '18 and found the same results. Checking it warm after 10 minutes would give me a reading and checking it cold would give me either the same reading or slightly higher, which makes sense since there is more time for more residual oil to drain down in the sump (but not enough to be statistically significant). I've always checked all my vehicles cold since it's (a) convenient, and (b) provides maximum opportunity for oil to return to the sump. So I always check cold unless I'm on a road trip or there is reason for concern.

As long as you are consistent, you'll know if something is off with the reading (over- or under-filled).

 

As mentioned above, I had no issues checking my '18 F-Type when cold and Oz does it on his '14 so I believe the electronic dipstick functionality is always live, except when the car is running. My BMW was the opposite (which drove me nuts). You absolutely could not check the oil unless the car was running (and for +/- 20 minutes). If you're low on oil, having to run it for 20 minutes to find that out seems like an engineering misstep.

 

I check my MY18 after it's been sitting overnight, too - never been an issue.

 

If you're not ready to commit to the MityVac DIY option, you could buy a more inexpensive syringe-type motor oil extractor pump to remove the excess, via the tube inside the filler port. I did that after a JLR garage overfilled my F-Type by about 0.8 quart (as gauged by my P300's actual dipstick). Such careless overfills have been so common in my driving history, I learned to distrust dealer oil service. Now out of JLR warranty, I'm more trusting of my MityVac.