2016 Mazda CX-5 GT AWD w/Tech Pkg
- Plano, Texas, USA
So your observation:I changed the oil on my 2018 CX-9 yesterday.
Oil level check after letting the car sit for about 12 hours. Did a pull, wipe, reinsert, then pulled again and took the picture.
View attachment 227186
After 30 mins of driving, this is the oil level check 6-7 mins after vehicle shutdown (as recommended by the manual).
View attachment 227187
It's a little hard to see, but there is a difference in the oil level shown on the dipstick.
So what does this mean? Well, IMO it means that reading your oil when cold results in a higher reading than when the oil level is read according to the manual. So let's say the dealer were to do an oil change following the procedures in the manual, then top up the oil so that it's right at the "Full" mark. Someone who checks the oil while cold might think that the dealership overfilled the engine, when they actually didn't.
To be fair, judging by the difference in levels, the "overfilled" amount is nothing to be concerned about IMO. This also means that if you do check your oil level when cold (and top it off to the "Full" mark when cold), then your oil level when read according to the manual would actually be a little below the "Full" mark. Again, nothing to be concerned about.
That's my interpretation from my experience with my engine.
⋯ So what does this mean? Well, IMO it means that reading your oil when cold results in a higher reading than when the oil level is read according to the manual.
And your statement in post #91:
They totally contradict each other.⋯ Basically, OP saw posts about oil being "underfilled" from factory, and posts suggesting that oil needs to be added upon delivery. After confirming that the oil level in his GT Reserve (not 2.5 NA) is at the MAX line when cold, and above the MAX line when level is read using the procedure outlined in the manual, he suggested that those posts were actually wrong, and that people may have been checking their oil levels incorrectly.
And the statement from OP:
Which also contradict your observation too on the 2.5T.I have a new GTR and brand new to this forum.
FWIW, if my thinking is correct, a lot of the DIY oil change posts here are getting things wrong. They may acctually be overfilling. Max on a cold fill should be lower than MAX. Maybe just putting in what MAZDA says is the right capacity for your engine is where you should be filling your oil regardless of whether it hits MAX on the dipstick or not.
So your claim in post #91:
“@Steve88 has not replied with an answer from Mazda, but based on the procedure outlined in the manual and the fact that the 2.5T's engine uses a different dipstick than the 2.5 NA, I think it's fairly safe to come to the conclusion that the 2.5T dipstick is calibrated for hot oil temps.“
should be false too?