Does anyone have a rational basis as to why the answer to most mixing questions includes a hefty dose of "just stay within the same brand" in the replies? Is there a basis to think that every blend from a given brand uses the same add package at the same dose? Similarly, is there a basis to think that different brands have entirely different additive packages?
just stay within brand...
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Originally Posted By: GMorg
Does anyone have a rational basis as to why the answer to most mixing questions includes a hefty dose of "just stay within the same brand" in the replies? Is there a basis to think that every blend from a given brand uses the same add package at the same dose? Similarly, is there a basis to think that different brands have entirely different additive packages?
No. The thinking is simply that staying within a brand increases the likelihood of similar additive packages.
Not saying whether I endorse any of this, BTW.
Does anyone have a rational basis as to why the answer to most mixing questions includes a hefty dose of "just stay within the same brand" in the replies? Is there a basis to think that every blend from a given brand uses the same add package at the same dose? Similarly, is there a basis to think that different brands have entirely different additive packages?
No. The thinking is simply that staying within a brand increases the likelihood of similar additive packages.
Not saying whether I endorse any of this, BTW.
Ideally, first choice is same brand, same type and same grade, example: Pennzoil Platinum 5w20.
Second is same brand: same type but different grade (Example Mobil 1 0W20 and Mobil 1 5W30) or different type but same grade (Example Mobil 1 0W20 and Mobil 5000 5W20).
Third is same brand but different type and different grade
Second is same brand: same type but different grade (Example Mobil 1 0W20 and Mobil 1 5W30) or different type but same grade (Example Mobil 1 0W20 and Mobil 5000 5W20).
Third is same brand but different type and different grade
I've mixed brands, weights and types, (conventional and synthetic), on numerous occasions to do an Oil Change. I've never had any problems and don't even consider it an issue. As long as the oil is new and clean, within the API certification with the Donut display of SJ,SM then it is used.
Why have single quarts of oil from different brands hanging around.....clean quality oil....IMO....is all the same. IMO....better than what you'll get at some of the quick lube places where they can't guarantee what is in the barrel. Just use it and rest well.
Why have single quarts of oil from different brands hanging around.....clean quality oil....IMO....is all the same. IMO....better than what you'll get at some of the quick lube places where they can't guarantee what is in the barrel. Just use it and rest well.
I'm not asking if it is OK to mix. I wanted to know where these "rules" originate. I suppose I should have added the "same grade, different brand" answer too. Without knowing more about either starting material or the final mix, it seems just as valid to say "just stay with similar colored bottles."
I've seen the "same brand" or "same weight" answer posted here hundreds of times. My question is either "what is the origin of this myth" or "what is the factual basis of these 'rules'".
By the way, there are literally hundreds of posts with these rules.
I've seen the "same brand" or "same weight" answer posted here hundreds of times. My question is either "what is the origin of this myth" or "what is the factual basis of these 'rules'".
By the way, there are literally hundreds of posts with these rules.
Who knows where people get their ideas from. They are people always posting those kind myths as facts.
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