Would there be any advantage to mixing the two? Maybe higher detergency, longer life?
Does anybody here do this?
Does anybody here do this?
Mixing PCMO and HDMO ?
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No advantage at all with all the tools to choose from that are in the form of oils offered for various uses .
Yes, mixing them could potentially result in a truly superior motor oil. Or a truly inferior motor oil. And you'll never know which it is. But through both lab and real world testing, the major brand formulations are well known in regards to their performance characteristics. One should feel free to mix oils to their heart's content...so long as they're more knowledgable than the petrochemists at Castrol, Pennzoil, Amsoil, etc.
Mix away....you'll be OK!!!
It's been proven time and time again that all oil are compatible with each other.
The only drawback to mixing is that you are diliuting the additives on the better oil with the lesser oil.....but then again, that's the point......to come up with a medium duty oil that isn't pricey!
I've mixed time and time again with good results. My latest concoction will be 5qts of Motorcraft 15w40 HDEO with 1 qt of Red Line 10W-40!
It's been proven time and time again that all oil are compatible with each other.
The only drawback to mixing is that you are diliuting the additives on the better oil with the lesser oil.....but then again, that's the point......to come up with a medium duty oil that isn't pricey!
I've mixed time and time again with good results. My latest concoction will be 5qts of Motorcraft 15w40 HDEO with 1 qt of Red Line 10W-40!
I confess I like the idea of mixing. Have contemplated mixing HDMO with PCMO, particularly when the lower phosphorus rules are in effect (soon or now) with the new GF-4 oils. One or two quarts of HDMO could bring the ZDDP levels back up to GF-3 levels.
I have been thinking of mixing a quart of Redline into regular oil too.
I will freely mix different grades of the same brand such as 10w30 and 10w40 if I want a thicker 10w30, or could get a different brand 10w30 that already is thicker, perhaps a high mileage oil.
But as stated above, who knows if the mix really is better than an off the shelf oil?
I have been thinking of mixing a quart of Redline into regular oil too.
I will freely mix different grades of the same brand such as 10w30 and 10w40 if I want a thicker 10w30, or could get a different brand 10w30 that already is thicker, perhaps a high mileage oil.
But as stated above, who knows if the mix really is better than an off the shelf oil?
In summer time I mix 4 qts. Rotella 15-40 and 2 quarts of whatever 10-30 I have around. Usualy Chevron supreme. In the winter just 10-30. This in my wifes Jeep GC purchased new which now has 132000 miles on it.
Bob
Bob
In my opinion, depending on the concentration of the "good oil" into the "lesser oil", the worst that could happen is that you end up with an oil very very slighty better or equal to the lesser oil.
Guys, the fact is that ALL base oils (at least the common ones such as Grp I, II, II+, III, IV, and V-[the commonly used esters]), are ALL compatible with each other. In fact, many if not most oils are a combination of 2 or more of these different groups. A good example was the old M1 Tri-Syn, which has been said to be Grp IV and 2 different types of Grp V bases.
Also, additives used by the well known oil blenders are all the same and are of high quality and proven through testing and everyday driving. In other words, Pennzoil, QS, Castrol, etc does not used any "weird" additives such as clonirated parafins, graphite or baby oil. They all used the same moly, boron, zinc and phosphorous, althoguh some may or may not contain ALL such additives in a single formula. In fact, as I understand it, a company named Lubrizol supplies the additives to most oil blender, including Amsoil and Mobil.
In conclusion, in my opinion, as long as you stay away from stuff like Slick 50, Z-MAX, Prolong and others and stick to well know oils, you will be OK!!
[ September 22, 2004, 10:28 PM: Message edited by: Last_Z ]
On the Bitog forums, some are Auto Rxer's, some are FP & LC junkies, some are filter fanatics, and then there are the "home brew" mixers.
I confess, I can't resist, I'm a mixer.
My current favorite HDEO mix is Chevron Delo 10W-40 with either Chevron or Havoline 10W-30.
Delo has a boatload of calcium & lacks the magnesium that is found in Motorcraft, Delvac & Rotella.
So my thoughts are that Delo blends nicely with the calcium, moly & boron of the Chevron/Havoline PCMO's.
I confess, I can't resist, I'm a mixer.
My current favorite HDEO mix is Chevron Delo 10W-40 with either Chevron or Havoline 10W-30.
Delo has a boatload of calcium & lacks the magnesium that is found in Motorcraft, Delvac & Rotella.
So my thoughts are that Delo blends nicely with the calcium, moly & boron of the Chevron/Havoline PCMO's.
I agree with Last Z the only reason Chevron prints that stuff on there website is to keep you mixing(using) their product. I can mix my Redline with there M1 with good results its been shown time & time again on the UOA's.The statement that AMSOIL made about using Moly in long OCI is something I don't know but perhaps thats why RL is good for 5000 tops.
Standard answer: It depends! In most case, really no issue. But I would not go in blind! Science, fact gathering, logic, mind picking, UOA's.....should be your guide.
I like to at least stay in catergory. Looks like my 50/50 Amsoil and Pennzoil 15w40 are doing great. UOA coming up!!!
I like to at least stay in catergory. Looks like my 50/50 Amsoil and Pennzoil 15w40 are doing great. UOA coming up!!!
Most definitely I'd go with 2 qts Shell Rotella 15w40, 1.5 qts Mobil 1 5w30, and 1.5 qts Redline. That's the perfect blend.
Actually that's a completely random mix of random motor oils, but I couldn't resisit throwing in some "mixing wisdom" gibberish. Perhaps a dartboard or one of those carnival roulette wheels with oils listed on them could determine the best mix -- spin three times and whatever it lands on, you mix those three oils. Ironically this would be just as logical -- and effective -- as educated guessing and other hunches.
Actually that's a completely random mix of random motor oils, but I couldn't resisit throwing in some "mixing wisdom" gibberish. Perhaps a dartboard or one of those carnival roulette wheels with oils listed on them could determine the best mix -- spin three times and whatever it lands on, you mix those three oils. Ironically this would be just as logical -- and effective -- as educated guessing and other hunches.
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