Was concerned,this being our first direct injected powered vehicle, about fuel dilution after reading many, many horror stories about other manufacturers problems. Apparently that this is not an issue with Mazda. As many of you know from my previous post and UOA's that I'm a big believer in using appropriately rated HDEO's in my gas burner's and pushing the boundaries of extended mileage oil change intervals. However I think I'm going to be more reluctant with my two Mazda direct injected vehicles to push those boundaries. This 2019 has cylinder deactivation and even though there's no documented evidence of it being an issue with the Mazda engines, many other manufacturers with cylinder deactivation have had the issue of oil gumming up the piston rings in the deactivated cylinders.
STP/Amalie 5W-40, 2019 Mazda CX-5, 8K OCI, 111K Miles
- Thread starter Stumpy
- Start date
This doesn't look like a HDEO add pack, more like a euro add pack (which is also diesel rated of course).
This is one of the best UOAs I've seen on this site. Try 12,000 miles next time, TBN is still 5.5.
Well, they didn't have any when I went by the store so I've got Pennzoil Platinum 10w-30 High Mileage in it now and I will go to 10K miles with that and see how it shakes out. Like I said, I had read so much bad stuff about how other brands of cars GDI engines that were diluting oil and such, I just resigned myself to shorter OCI's but the proof is in the numbers.
If you really want to know how much fuel is in your oil, you should not be using Blackstone. Their method (deriving fuel from flashpoint, instead of measuring it directly) is the least accurate. Oil Analyzers uses Gas Chromatography which is much more accurate. There are several posts here with people sending the same oil to both labs and Oil Analyzers is showing ~4x more fuel than BS. I have my own example. I used BS several times on our 2018 CRV. Despite very low flashpoints (345 degrees), Blackstone never said I had more than 2% fuel. Same car tested at Oil Analyzers several times and it has never gotten less than 4.4% fuel at that lab. And three times it has gotten the highest ">5%" rating.
Very good numbers on those tests!
4,000 miles per month is very easy on the oil. I would just use supertech.
4,000 miles per month is very easy on the oil. I would just use supertech.
Yeah, I didn't notice how much he was driving. At 4000 miles a month, your fuel dilution will be as low as it can get. Now my wife's CRV only gets driven ~400 miles per month. Short trips=high fuel.
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