What kind of conventional oil the dealer was using? A Ford? Did they use Ford oil filter too? If they’re going to use full synthetic 5W-30 oil this time, do they change the oil filter too? Make sure to get another new Mazda OEM PY8W-14-302 or 1WPY-14-302 oil filter for your 2.5T, as the oil filter is vertical mounted and there’s about 0.3 quart of old oil stuck in there.
For how long has the oil been changed? Recommended OCI is 7,500 miles or 12 months whichever comes first.
So your 2016.5 CX-5 Sport doesn’t have the 2.5L? The manual says the “approximate” oil capacity on engine oil for 2.5L is 4.8 quarts but 2.0L is 4.4 quarts.
What kind of oil is it? Modern oil contents a lot of detergent so the oil gets dark in short period of time is pretty normal. Changing the oil in 12 months meets Mazda’s recommendation even though the oil is only been used for 3,500 miles.That's it, 4.4 qts. Just under 4.5
It's only 3500 miles but it's been a year since I changed it. I think the oil is probably not that acidic because I drive it on the highway every time I take it out. Nevertheless the oil looked fairly dark when I wiped the dipstick on a clean paper towel. I drained it out last week and noticed it's pretty dark in the pan as well. I wonder if the engine produces too much soot?
If you don’t feel comfortable of using conventional oil in your turbo engine, and the dealer is not willing to change the oil filter when they change the oil, there is at least 0.3 quart of old conventional oil in filter can’t get drained out. The result is you mix 4.8 quarts of fresh full synthetic oil with 0.3 quart of old conventional oil. You can insist that the filter needs to be replaced or the old conventional oil can’t be drained completely. The filter itself is fine. If they refuse it, you can offer to pay for the new oil filter. Or at least ask the tech to remove the filter、dump the old oil inside、then reuse it. It’s your call.
You’ll never know those dealers. The worst could just bring your car in、do nothing、then give the car back to you telling you it’s done. The oil is fresh already and you can’t tell it has been replaced again. I’d try to take a peek if possible making sure they’re changing the oil and filter. At least ask for an invoice showing full synthetic oil、filter、and drain plug washer as the parts been used.
The old oil is Pennzoil Platinum Synthetic 5w-30.
Second that strategy.
So you’re using Pennzoil Platinum Synthetic which is an excellent oil. 5W-30 viscosity is also recommended by Mazda worldwide for your 2.0L, although Mazda says only 0W-20 here in the US. I’d not be worried about what you see in the drained oil from oil filter with tiny microscopic dark grains. This proves the oil filter did its job. If you really concerned, do a UOA which will tell you a lot more than what you see from the old oil. Just stick with good full synthetic oil and OEM oil filter (IMO, even the cheap OEM Value oil filter is better than those “one-size-fit-all” after-market oil filters), and change it once a year even if you only drive very minimum miles, you’ll be fine.
Same here only at a Toyota store. The “free“ tire rotation, oil and filter change only consisted of fresh oil in my new at the time tundra. I’ve always changed my own oil but I figured it’s free so why not. What’s bad is that they denied it. Lost my business at from that point forward. Love the truck. Despise being lied to.
Sounded like a good dealer after all. Thanks for the update.
