I have mixed before, but only within the same brand of motor oil. I have changed brands of motor oil from one OCI to another ... since some of the previous motor oil remains in the engine (since it can't be drained out completely), then a little mixing goes on then, but not on the same level as making a 50/50 mix, for example.
Mix Oil Brands for Oil Change?
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Originally Posted By: OVERKILL
Originally Posted By: deven
Originally Posted By: Shannow
Originally Posted By: Dallas69
Mixed oil doesn't turn into molasses you know.
It can, has, and has been documented in SAE papers.
Rare, but it CAN happen.
How recent was that SAE paper? Was this on conventional oil, synthetic oil or both? I think with the purity of todays SN rated oils, mixed oil turning into molasses fear is little to none.
It isn't the "purity" of the oils, is the clash of additives packages and PPD's used in anything that isn't PAO that can result in the oil's cold temperature performance degrading when blended with another lubricant that may use a different suite of additives due to different composition.
I can see the degradation of performance during a cold start up but can't see how with the newer oils made with better basestocks and better additive vehicles turning oil into "molasses" Maybe a little thicker at startup that the engine might never even realize over 300,000 miles.
Originally Posted By: deven
Originally Posted By: Shannow
Originally Posted By: Dallas69
Mixed oil doesn't turn into molasses you know.
It can, has, and has been documented in SAE papers.
Rare, but it CAN happen.
How recent was that SAE paper? Was this on conventional oil, synthetic oil or both? I think with the purity of todays SN rated oils, mixed oil turning into molasses fear is little to none.
It isn't the "purity" of the oils, is the clash of additives packages and PPD's used in anything that isn't PAO that can result in the oil's cold temperature performance degrading when blended with another lubricant that may use a different suite of additives due to different composition.
I can see the degradation of performance during a cold start up but can't see how with the newer oils made with better basestocks and better additive vehicles turning oil into "molasses" Maybe a little thicker at startup that the engine might never even realize over 300,000 miles.
OVERKILL
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Originally Posted By: deven
I can see the degradation of performance during a cold start up but can't see how with the newer oils made with better basestocks and better additive vehicles turning oil into "molasses" Maybe a little thicker at startup that the engine might never even realize over 300,000 miles.
The potential issue is really only at extremely cold temperatures. As long as the product remains pumpable I doubt anybody would even know that any sort of degradation happened.
I can see the degradation of performance during a cold start up but can't see how with the newer oils made with better basestocks and better additive vehicles turning oil into "molasses" Maybe a little thicker at startup that the engine might never even realize over 300,000 miles.
The potential issue is really only at extremely cold temperatures. As long as the product remains pumpable I doubt anybody would even know that any sort of degradation happened.
How do people really think they can improve an oil by randomly mixing two together ?!
OVERKILL
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Originally Posted By: bobbydavro
How do people really think they can improve an oil by randomly mixing two together ?!
Shannow and I have asked that question many times sir
How do people really think they can improve an oil by randomly mixing two together ?!
Shannow and I have asked that question many times sir
I can only speak for myself.
I only mix when I need a qt to go with a jug for an oil change if I dont happen to have the same oil as the jug.
I have mixed during top offs.
I don't just use 2 of these with 1 of those with 3 of these.
I have alot of brands in my garage to pick from.
I am in no way an expert on oil like some.
I just know from experience that nothing bad has happened to me.
I am not trying to outthink the oil companies.
I just dont think it is that big of a deal.
I only mix when I need a qt to go with a jug for an oil change if I dont happen to have the same oil as the jug.
I have mixed during top offs.
I don't just use 2 of these with 1 of those with 3 of these.
I have alot of brands in my garage to pick from.
I am in no way an expert on oil like some.
I just know from experience that nothing bad has happened to me.
I am not trying to outthink the oil companies.
I just dont think it is that big of a deal.
Originally Posted By: OVERKILL
Originally Posted By: bobbydavro
How do people really think they can improve an oil by randomly mixing two together ?!
Shannow and I have asked that question many times sir
Still waiting I guess?
Originally Posted By: bobbydavro
How do people really think they can improve an oil by randomly mixing two together ?!
Shannow and I have asked that question many times sir
Still waiting I guess?
OVERKILL
$100 Site Donor 2021
Originally Posted By: bobbydavro
Originally Posted By: OVERKILL
Originally Posted By: bobbydavro
How do people really think they can improve an oil by randomly mixing two together ?!
Shannow and I have asked that question many times sir
Still waiting I guess?
Yup
Originally Posted By: OVERKILL
Originally Posted By: bobbydavro
How do people really think they can improve an oil by randomly mixing two together ?!
Shannow and I have asked that question many times sir
Still waiting I guess?
Yup
Originally Posted By: OVERKILL
Originally Posted By: bobbydavro
Originally Posted By: OVERKILL
Originally Posted By: bobbydavro
How do people really think they can improve an oil by randomly mixing two together ?!
Shannow and I have asked that question many times sir
Still waiting I guess?
Yup
Case: You get Pennz Plat 5w-30 (or Castrol 0w-40), which has very little ppm of Anti-Wear additives. Then, you think, hmmm, Mazda Genuine Motor Oil 0w-20 has 600 ppm of moly, so what if I put 1 quart of the 0w-20 with the Platinum? Then moly goes up by about 100 ppm, to around 150 ppm in the Plat-MGMO mix, and what engine doesn't benefit from a little more moly?
Originally Posted By: bobbydavro
Originally Posted By: OVERKILL
Originally Posted By: bobbydavro
How do people really think they can improve an oil by randomly mixing two together ?!
Shannow and I have asked that question many times sir
Still waiting I guess?
Yup
Case: You get Pennz Plat 5w-30 (or Castrol 0w-40), which has very little ppm of Anti-Wear additives. Then, you think, hmmm, Mazda Genuine Motor Oil 0w-20 has 600 ppm of moly, so what if I put 1 quart of the 0w-20 with the Platinum? Then moly goes up by about 100 ppm, to around 150 ppm in the Plat-MGMO mix, and what engine doesn't benefit from a little more moly?
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Loads of engines cope fine without moly. Japanese seem to love using moly. But then they also have lots of Japanese companies making the stuff
It's purely guess work assuming that all the other additives have no effect
You can get some odd low temperature effects with mixing different DI/VM technologies. But really I don't understand what people really think extra moly will achieve in an oil with an additive pack that has been optimised already.
It's purely guess work assuming that all the other additives have no effect
You can get some odd low temperature effects with mixing different DI/VM technologies. But really I don't understand what people really think extra moly will achieve in an oil with an additive pack that has been optimised already.
Like I said earlier in the thread, you have to assume
a) that the additives work linearly with dose rate; and
b) they work cumulatively together; and
c) with the new basestock viscosity.
Chances of all of those "ands" coming together to even break even are astronomical.
a) that the additives work linearly with dose rate; and
b) they work cumulatively together; and
c) with the new basestock viscosity.
Chances of all of those "ands" coming together to even break even are astronomical.
OVERKILL
$100 Site Donor 2021
Compatible doesn't equal optimal. Shannow already posted the details of the compatibility test.
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Valvoline will tell you anything in a desperate attempt to get you to but their junk. I learned this from first-hand experience.
Originally Posted By: Dallas69
Funny,I was just in the Valvoline site checking on some things and in the faq section they said any synthetic and dino are 100% compatible.
I guess they dont know what they're talking about.
Originally Posted By: Dallas69
Funny,I was just in the Valvoline site checking on some things and in the faq section they said any synthetic and dino are 100% compatible.
I guess they dont know what they're talking about.
Originally Posted By: Dallas69
Funny,I was just in the Valvoline site checking on some things and in the faq section they said any synthetic and dino are 100% compatible.
I guess they dont know what they're talking about.
by API and ILSAC, Compatible is "miscible", and by ASTM6922 defines that with any of the 6 reference oils (not every oil in the world, 6 reference oils), that they are mixed, cooled to their new pour point, heated to 150C, coooled again to the pour point temperature established for the mix...
Then they don't create jello chunks, split like a salad dressing, or drop out precipitates...
A fail on 6922 is a serious thing, and they don't do it.
What 6922 DOES NOT offer is that ANY of the other tests that either oil passes are still passed by the mix...of the test oil, and the SIX API reference oils.
BTW, that Valvoline site also claims that they invented "engine oil"...
In 1866...
Steam engine oil...
Funny,I was just in the Valvoline site checking on some things and in the faq section they said any synthetic and dino are 100% compatible.
I guess they dont know what they're talking about.
by API and ILSAC, Compatible is "miscible", and by ASTM6922 defines that with any of the 6 reference oils (not every oil in the world, 6 reference oils), that they are mixed, cooled to their new pour point, heated to 150C, coooled again to the pour point temperature established for the mix...
Then they don't create jello chunks, split like a salad dressing, or drop out precipitates...
A fail on 6922 is a serious thing, and they don't do it.
What 6922 DOES NOT offer is that ANY of the other tests that either oil passes are still passed by the mix...of the test oil, and the SIX API reference oils.
BTW, that Valvoline site also claims that they invented "engine oil"...
In 1866...
Steam engine oil...
http://www.mobil1.com.au/academy/faq.aspx
Quote:
Mobil 1 is fully compatible with conventional engine oils, semi-synthetic engine oils and other synthetic engine oils if you need to mix them. However, it is important to note that the superior performance of Mobil 1 will be reduced by diluting it in any way.
http://www.fuchs.com.au/ProductDetail.aspx?product_id=37362
Quote:
TITAN GT1 0W-20 is miscible and compatible with conventional branded engine oils. However, intermixtures with other engine oils should be avoided in order to fully utilize the product’s benefits
Like I've been saying...
The Valvoline is aimed at the lowest common denominator...and it works.
Quote:
Mobil 1 is fully compatible with conventional engine oils, semi-synthetic engine oils and other synthetic engine oils if you need to mix them. However, it is important to note that the superior performance of Mobil 1 will be reduced by diluting it in any way.
http://www.fuchs.com.au/ProductDetail.aspx?product_id=37362
Quote:
TITAN GT1 0W-20 is miscible and compatible with conventional branded engine oils. However, intermixtures with other engine oils should be avoided in order to fully utilize the product’s benefits
Like I've been saying...
The Valvoline is aimed at the lowest common denominator...and it works.
wemay
Site Donor 2023
So Valvoline's claim is passed over as a marketing ploy but M1 and Titan's assertion that mixing their 'superior' product with something else will 'dilute' their uber performance, is not?
I'll agree that mixing may not be optimal, but that my friends is also marketing.
I'm talking strictly about marketing here.
I'll agree that mixing may not be optimal, but that my friends is also marketing.
I'm talking strictly about marketing here.
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does it really matter unless you're trying to stretch your OCI's beyond the recommended mileage?
I still haven't found a UOA on here where the oil was so far gone that the analysers sh*t their pants. I haven't read them all though, but even if the mixtureonly lasts 80% as long as the individual oils there won't be an issue for 99% of the users.
I still haven't found a UOA on here where the oil was so far gone that the analysers sh*t their pants. I haven't read them all though, but even if the mixtureonly lasts 80% as long as the individual oils there won't be an issue for 99% of the users.
Originally Posted By: wemay
So Valvoline's claim is passed over as a marketing ploy but M1 and Titan's assertion that mixing their 'superior' product with something else will 'dilute' their uber performance, is not?
I'll agree that mixing may not be optimal, but that my friends is also marketing.
I'm talking strictly about marketing here.
wemay, explain "passed over"
Then explain why you have just given Valvoline a free kick for "inventing engine oil in 1866"...on steam engines.
So Valvoline's claim is passed over as a marketing ploy but M1 and Titan's assertion that mixing their 'superior' product with something else will 'dilute' their uber performance, is not?
I'll agree that mixing may not be optimal, but that my friends is also marketing.
I'm talking strictly about marketing here.
wemay, explain "passed over"
Then explain why you have just given Valvoline a free kick for "inventing engine oil in 1866"...on steam engines.
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