M1 5w-30 4250miles Mazda 6s

[gcubed]

This is my UOA on my Mazda6s. This is the first time i ever did a UOA and am still understanding all the numbers/metals. This was the second oil change on my car. Factory fill replaced around 3650 miles. I do 90% of my driving in heavy city stop and go traffic. It is using Mobil1 5w-30, i have since switched to 0w-20 because i found a place that sold it around me with positive feedback from drivers. Any feedback will be greatly appreciated. (i dont think they could read my handwriting on my engine type, so i think the averages are wrong...)

Scotts Mazda6s UOA

 

[gcubed]

yeah, that was the only bad part i saw (viscosity) when comparing to other similar reports. Also, when comparing to the above cars, mine is 90% city traffic, 10% highway... the other 2 are opposite... 80-90% highway miles. I switched to 0w-20 and am going ot keep the same interval and get another UOA to see if it helped.

 

[Bror Jace]

I wonder why the viscosity would spike so much in such a short time? I thought M1 SS was more stable than that?

gcubed, does the temp seem to rise in heavy/slow traffic? The car's, not yours.

Is it possible that the oil was mis-labelled? Might this be 15W50 instead? The difference might even be noticeable in the way it pours. Anyone know what that stuff looks like in virgin form?

crossbow's 0W20 (Mobil 1) results look a lot better ... but in addition to break-in, driving habits/circumstances might also be playing a part in the disparity.

--- Bror Jace

 

[Schmoe]

Second that, M6 liked the 0W-20 without a doubt. Iron level would make me do another round of UOA's. If still high, I'd switch over to the 0W-20 and try that. It has been proven numerous times right here that certain engines like certain oils. I'm doing the same thing to my wifes Accord. Wonder what would make that viscosity jump up like that. Wow

I just posted the UOA on the Honda with same oil, V6 24 valve engine with 5200 miles, visc. dropped to 58.7, barely in the 30 weight range. Besides engine being different, these were all exclusively highway miles. I always thought that city miles would "beat" an oil up more, thus, shearing quicker which would drop the viscosity down sooner.

Did I say SOONER??? GO OU

[ October 20, 2003, 02:32 PM: Message edited by: Schmoe ]

 

[gcubed]

i already switched to 0w-20 on that oil change... i heard nothing but good things from anyone with a M6 that used it. So i will see if things change (hopefully) also, i have about .5 quart left of the 5w-30 from my last oil change (the one the UOA was done on) would it be advantagous to do a VOA on it to see if the viscosity was "weird" in any way?

 

[buster]

Nice report. Somthing is up with M1's viscosity lately. I think it's thicker now. This is way too thick. I'll have to send a VOA off this week. Anyone know the cost thru BLKstone labs? Silicon is high but it didnt effect wear too much. Maybe just the copper.

 

[joee12]

Scott, the iron level is high, but could be due to engine breaking in. -Joe

 

[crossbow]

For comparitive purposes...

Here's the same vehicle 2003 Mazda6s running 0w-20.
Mazda6s ATX 0w-20 UOA

Miles: 5000 miles
Miles on Oil: 3321

element: uoa
Aluminum: 3
Chromium: 1
Iron: 14
Copper: 8
Lead: 0
Tin: 0
Moly: 68
Nickel: 0
Manganese: 0
Boron: 146
Silicon: 19
Sodium: 7
Calcium: 2871
Magnesium: 26
Phosphorus: 777
Zinc: 835

Viscosity SUS @ 210F: 56.6
Flashpoint F: 390
Fuel < 0.5%
AntiFreeze: 0.0%
Water: 0.0%
Insolubles: 0.2%

And here's a report on the same vehicle 2003 Mazda6s running Castrol 5w-20.

Miles: 12,554 miles
Miles on Oil: 3897

element: uoa/voa
Aluminum: 5/0
Chromium: 3/0
Iron: 20/1
Copper: 5/0
Lead: 1/0
Moly: 107/103
Nickel: 1/0
Manganese: 1/1
Boron: 8/2
Silicon: 17/6
Sodium: 3/1
Calcium: 2553/2414
Magnesium: 4/3
Phosphorus: 842/823
Zinc: 902/1018

TBN: 4.2
Viscosity SUS @ 210F: 51.8/54.7
Flashpoint F: 415/435
Fuel < 0.5%
AntiFreeze: 0.0%
Water: 0.0%
Insolubles: 0.4%

 

[Robbie Alexander]

quote:

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Originally posted by gcubed:
-*-*-*UOA[/URL]

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Maybe you are the universal average ???
The tests need to be several to make a trend.
Pass judgement after a few more.