Mazda CX7 UOA

[Eddie]

2007 CX7. Miles on vehicle 11,990. Miles on oil 6,010. Mazda oil filter, Pennzoil 5w30 + 7 oz of VSOT (Silver 15 oz bottle). All suburban driving with trips varying from 3-8 miles.
BlackStone Laboratories Results:

6,010 miles Universal Ave for 3,900 miles

AL 4 3
CR 1 1
FE 31 18
CU 29 28
PB 4 1
MO 179 61
Boron 22 20
Silicon 7 5
Sodium 3 20
Mag 12 19
PHos640 632
Zn 813 758
SUS 61.3 @ 210 56-63
cST @ 100C=10.59 9.1-11.3
Flash= 385 >365
Fuel= Insolubles= 0.4
I don't know why the two columbs moved so close together

 

[pitzel]

Looks like a good report; Fe and Pb are likely due to break-in with such a new engine.

Probably not a problem running that for 8k miles. If you were to go with a synth product, 15k probably would be a fairly realistic target.

 

[Eddie]

I was pleased with the report myself, considering it is still in the break-in phase. I will continue with PP ( full synthetic)5w30 + 7.0 oz of VSOT and 6,000 Mile OCI. At ~24,000 miles I will do another UOA and adjust the OCI at that time.

 

[astraelraen]

This is pennzoil synthetic or conventional?

I just sent a sample for a UOA on my 2007 CX7 in the mail on Saturday.

 

[Eddie]

Pennzoil Platium (PP) is a full synthetic oil

 

[glennc]

Pretty low phosphorous and zinc considering you juiced the oil with VSOT. Either it isn't what it once was, or it's still highly variable and you got a weak batch.

I'm not blown away by the wear numbers I see for PP. It's just my personal suspicion that you would see better numbers with the yellow bottle.

 

[Gary Allan]

Quote:
Pretty low phosphorous and zinc considering you juiced the oil with VSOT.


Well, the moly sure is there

 

[Last_Z]

Ed,

As stated before, the extra iron and copper are likely from break-in. At 5k miles, my engine was still shedding metals. The next sample will cut those metals in half, at least. Your fuel is so much better than mine. It's probably due to the much better weather you have in Florida. I wish my fuel numbers were that good. Anyway, excellent report!

Rick

 

[badtlc]

Originally Posted By: glennc
Pretty low phosphorous and zinc considering you juiced the oil with VSOT. Either it isn't what it once was, or it's still highly variable and you got a weak batch.

I'm not blown away by the wear numbers I see for PP. It's just my personal suspicion that you would see better numbers with the yellow bottle.


That is a very strong statement considering this engine. The yellow bottle probably wouldn't last 5k in this engine. The DISI turbo 2.3L is an oil bashing monster, mainly from fuel dilution.

 

[Eddie]

Oil bashing monster? I think not. My fuel dilution levels were good as were my wear metals for this mileage. Any fuel dilution, while undesirable seems not to causing wear issues with this engine based on UOAs I've seen.

 

[RI_RS4]

Eddie,

I'd respectfully disagree. You've not shown all of your UOA results so it's hard to be sure. However, Fe is certainly running a higher wear rate than the universal average, and the universal average itself is a bit high, when you normalize to per/1K mile rates. Pb also looks to be elevated, which is often a sign of dilution.

Since you "dinked" with the oil by using VSOT, it's hard to know whether Phosphorus is being washed from the tribo layers by the fuel.

 

[badtlc]

Originally Posted By: Eddie
Oil bashing monster? I think not. My fuel dilution levels were good as were my wear metals for this mileage. Any fuel dilution, while undesirable seems not to causing wear issues with this engine based on UOAs I've seen.


I have only seen one UOA from a DISI 2.3L turbo on this site that didn't show "serious" fuel dilution. That was a mazdaspeed6 with a CAI. His wear levels were well under yours. Your wear levels are right inline with all the other DISIs that have fuel dilution problems.

That does not mean you aren't seeing some break-in, but there is more than enough evidence on this site to show these motors are really tough on oil. Maybe yours will be the first one to not fall into that category down the road.

 

[badtlc]

Originally Posted By: RI_RS4

Since you "dinked" with the oil by using VSOT, it's hard to know whether Phosphorus is being washed from the tribo layers by the fuel.


Doesnt VSOT also thicken the oil?

 

[glennc]

Originally Posted By: badtlc
Originally Posted By: glennc
Pretty low phosphorous and zinc considering you juiced the oil with VSOT. Either it isn't what it once was, or it's still highly variable and you got a weak batch.

I'm not blown away by the wear numbers I see for PP. It's just my personal suspicion that you would see better numbers with the yellow bottle.


That is a very strong statement considering this engine. The yellow bottle probably wouldn't last 5k in this engine. The DISI turbo 2.3L is an oil bashing monster, mainly from fuel dilution.


I put in the part about it just being my personal suspicion so that it would not be a strong statement - at least that was the idea. Sounds like my personal suspicion could be wrong. The reason it was my personal suspicion, by the way, is that it is always my personal suspicion that the yellow bottle will put out lower wear numbers than the Platinum, unless it's a long oil run or an application that truly demands synthetic, or something like that. I'd forgotten about this engine's special nature. Thanks for the clarification. I'd still be interested to see what YB would do, but you're probably right.

 

[Eddie]

The univeral wear numbers are based on only 3,900 miles while my break-in UOA was for 6,010 miles. I see no issues with the wear numbers including the flash point.

 

[DmanWho]

Originally Posted By: glennc
Pretty low phosphorous and zinc considering you juiced the oil with VSOT. Either it isn't what it once was, or it's still highly variable and you got a weak batch...

I noticed that in my UOA using VSOT too. More of a moly and vis. booster. Not much happening in the way of ZDDP.

 

[Eddie]

In some months passed, a UOA on VSOT suggested that the formulation had changed. Zinc & one other ingredient? was reduced. This was done to meet the new lower Zinc level mandated by the government? I did only use ~ 7 oz or 1/2 bottle so the Zinc reduction is not as severe as it first appears. I have only one 15 oz bottle and when finished, that will be the end of it. I do like the additional moly during the break-in phase though.