quote:Most definetly, there are many factors that darken an oil! I almost can say without doubt the Schaeffers is a better product than the Valvoline Synpower - but I've never had any problems with the Synpower's durability myself so its also *good*. It will be interesting to see what you find. My only concern with darkening oil is if its a result of oxidation/cooking. If an oil is more resistant to this and is a better oil for higher temps - perhaps it wont oxidize as fast and will stay cleaner looking longer?
Originally posted by jjbula: Dominic, I'm going to compare Valvoline Synpower with Schaeffer Blend. When I reach 6 or 7K with the valvoline I'll switch over. The Valvoline is still not very dark at 5.6K. M1 normally gets darker sooner in my Camry. I'm not convinced that dark is bad, unless it is extra blowby that could be avoided. I would rather the "dark stuff" stay in the oil and not in the engine.
quote:I'd wouldn't go over 6k with Amsoil or M1, but Redline I do not know too much about. I've been using Amsoil since the spring but never intended to obey their absurd 25k intervals. I plan to switch to 10w30 Schaeffer's ASAP.
I don't think you will routinely see folks running the kind of change intervals that you can with the top line synthetics (Mobil 1, Amsoil, Redline). I think you can easily run the 6000 mile/6 month change intervals you are talking about with either oil. TooSlick[/QB]
quote:Why not? If analysis shows that it will do it, why wouldn't you. It all depends on the application, but for me, Mobil 1 Formula and TS 5W30 has been good to 9-11k intervals. I am hoping to be able to go even further than that with the 0W40 SuperSyn.
I'd wouldn't go over 6k with Amsoil or M1
quote:[ November 30, 2002, 10:57 PM: Message edited by: BOBISTHEOILGUY ]
Originally posted by TooSlick: Night Owl, Mobil 1 is a full (PAO/Ester) synthetic and has an initial TBN of about 12 ...the Schaeffers Supreme 7000 is about 30% synthetic (PAO) and also uses a good additive chemistry, but has a TBN of 7+ (their 5w-30/10w-30). You'll notice that the Schaeffers straight 5w30 mineral based oil shows 7.1 TBN. The 701 5w30 shows the same which has PAO added to it, as you pointed out. This statement made about the higher tbn being a better choice is invalid as we have proven many times how one tbn can deplete much faster than some others and through it all schaeffers has a better antioxidant level not shown in a td sheet. This higher level of antioxidants will put less strain on the oil and doesn't require a higher tbn to start with. In other-words, it doesn't need as much tbn to clean acids because it doesn't allow acids to form as easily unlike oils that require higher tbn to clean acids it can't stop from forming. I believe you will find that Mobil 1 offers advantages in engine cleanliness, longer change intervals and better engine performance in very cold or very hot weather. I think that until you try running the schaeffers blend yourself TS, you're basing your statements of your opinion with no actual experience with this oil and obviously not watched the oil analysis that are being reported back on schaeffers that closely. The blend is holding up as long as most synth's being reported. Fact is, the interesting thing about most of these extended drains is that the extended drains with schaeffers is usually on one filter and no makeup oil(in my analysis) and the other extended drains by synth's are with filter changes at 6k with make up oil which suggests replenishing additives to continue on. IMO, I believe you'd find that the blend has proven out to be a strong contender for a quality oil and at this time feel that the straight mineral oil is proving out to be an equal to extended drains as well as wear protection. The Schaeffers S7000 in an excellent value in a synthetic blend, but I don't think you will routinely see folks running the kind of change intervals that you can with the top line synthetics (Mobil 1, Amsoil, Redline). That statement is true do to your type of thinking with just the use of a TD sheet. Many fail to understand that just because it's not a full synth it can do the extended drains once you get past the stereotyping of the base oils used although many times you would correct in a lot of cases. I think you can easily run the 6000 mile/6 month change intervals you are talking about with either oil. Finally, I agree with that statement TooSlick
quote:Call me stupid, but I just can't leave oil in my car for 15k miles, much less 25k like AMSOIL claims. Why would I want that crap running through the engine for such a long time? I don't care if it is suspended in the oil, the filter will begin to slow oil pressure at some point (since it has collected so much stuff); but whatever doesn't get caught by the filter goes right back to the engine (in between bearings, cylinders, camshafts, etc) over and over and over. I will be switching back to M1 SS (currently running Havoline Syn 10W-30) and the most I will do is 5000-7000 miles. Rick [ November 30, 2002, 03:50 PM: Message edited by: Last_Z ]
Originally posted by Patman: The way I see it is if the oil can still do it's job perfectly well, why change it too often? In my case I have 4 cars in my family which I change the oil on, so I would rather not do 20 oil changes a year. So I try to stretch it longer, through oil analysis, to make sure I'm not going too far. I'm going to be doing a super extended interval test next year on both of my own cars, my wife's on Royal Purple 5w30 and mine with Schaeffer 10w30. I'll use the Fram Sure Drain system so that I can just drain out a small sample of the oil while still keeping the rest in there. It should be an interesting test, stay tuned! I'll be taking samples at the 9k, 12k, 15k (and every 3k beyond) mark on my Firebird, and at 5k, 8k, 11k on my wife's car. I won't change the oil until the analysis says it needs it.
quote:I normally like interspersed comments. They allow replies to points without restating/paraphrasing/mangling them. UBB code doesn't make it easy though. With old versions I ran I modified the code to put a "tweeze" button on the reply page. It inserted an endquote
Originally posted by satterfi: Bob Inserting your comments in someone else's post with the "reply with quotes" makes figuring out your response **** near impossible. It's too hard to figure out what you are trying to say. ...
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quote:The button just inserted: "(/QB)(/QUOTE) blanklines (quote)(qb)" Not sure if modifying the reply page is as simple with current versions. An easy way to make things readable is to switch out of bold. Of the various style changes, it stands out the most and requires the least keystrokes. (Unless some idjit posts with mixed bold.) David
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