Clean to black in 750 miles..

[BlazerLT]

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I would agree on smell and feel, but not color.

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Yea, and if it is Petro Canada 0w30 Group 3 right?

But seriously, you can test an oil through your fingers?

Doesn't surprise me that YOU said it.

 

[BigAl]

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I would suggest that an oil that does not darken significantly during use is a bad sign. This only means one of two things. You have some kind of a magical engine that runs perfectly clean, or the oil is not cleaning the normal deposits that occur in a normal engine.lean the engine better, and you will see more darkening.

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If many different brands of oil (the same in both engines) darken quickly in one engine but hardly at all in another, the difference must be the engine. Poor oil flow, temperature, hot spots, effective crankcase ventilation, and ring sealing might account for the difference.

 

[toocrazy2yoo]

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Oil changes are a royal pain on my Forenza . . . at least the oil filter part . . . but I'm up to the challenge. Lying on a cold garage floor in the middle of a Wisconsin winter builds character

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Nuff said!

 

[Ron AKA]

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But seriously, you can test an oil through your fingers?

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Sorry for being unclear I think you have it backwards. I was suggesting you can't determine quality of oil based on feel and smell (unless things are really bad). I was suggesting color does count. If you have clean oil after 3-5K then the oil is c r a p. Perhaps that is clearer

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[sxg6]

I agree with you on that. But i don't think you should be worried at just over 2k miles.. How many miles are on your Mazda 3?

 

[toocrazy2yoo]

Well, based on that, what good then, is the SLOB with all the calcium? I added SLOB to the Pennzoil Platinum 10W30 which was quite clean at 5600, or whatever. So the Pennzoil Platinum was no good at cleaning an engine that should need no cleaning at only 20K and has enjoyed pretty frequent OCI? I could buy that I suppose, but my thought before I read your theory was that the Pennzoil Platinum was more effective at resisting the high heat of summer, oxidation and absorbing and nullifying blowby than was the Dino Pennzoil for this last month of much easier conditions. The Pennzoil Platinum was some road, but mostly summertime around town. The DINO was mostly 55-80 MPH road miles. Yet, the DINO pennzoil went nasty-dark in fewer than half the miles.

(Understand, Ron, I'm doing the Devil's Advocate thing, not bustin your balz)

Alright, who's right here? Is the Pennzoil Platinum better at absorbing abuse? Or crummy at cleaning?

 

[Ron AKA]

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I agree with you on that. But i don't think you should be worried at just over 2k miles.. How many miles are on your Mazda 3?

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6700km on the car, and about 3700km on the oil. It looks almost the same color as the day I put it in. Perhaps it will go black overnight and I will feel much better!

 

[toocrazy2yoo]

Hey Ron!

Maybe a fast trip to Boston and back for some lobsters might wear that oil out for ya!

It worked for me...

 

[Ron AKA]

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Well, based on that, what good then, is the SLOB with all the calcium? I added SLOB to the Pennzoil Platinum 10W30 which was quite clean at 5600, or whatever. So the Pennzoil Platinum was no good at cleaning an engine that should need no cleaning at only 20K and has enjoyed pretty frequent OCI? I could buy that I suppose, but my thought before I read your theory was that the Pennzoil Platinum was more effective at resisting the high heat of summer, oxidation and absorbing and nullifying blowby than was the Dino Pennzoil for this last month of much easier conditions. The Pennzoil Platinum was some road, but mostly summertime around town. The DINO was mostly 55-80 MPH road miles. Yet, the DINO pennzoil went nasty-dark in fewer than half the miles.

(Understand, Ron, I'm doing the Devil's Advocate thing, not bustin your balz)

Alright, who's right here? Is the Pennzoil Platinum better at absorbing abuse? Or crummy at cleaning?

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Not sure I follow your logic totally, but I like to see my oil take the c r a p out as it forms. I suspect it forms at a very uniform rate providing the engine is in good mechanical contition and is not influenced by the miles on the vehicle. An API SM/GF-4 oil is not going to suffer significant oxidation in standard OCI's with syn or conv. So my thoughts are that each and every oil change should have the oil come out black or I got ripped off!