Are Syns cleaner than Dino, longterm?

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Cmarti

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Not looking for a war, just curious. Many posts on Syn v Dino, and I see much evidence that dino provides excelelent wear and shear stability. Many lobby it as a a better value.

I was curious as to sludge, varnish, and general crud. I recently changed a pcv valve and line in my Ford Truck. It gunked shut. Pulled the valve cover and much crud. This is on religious 3-4K OCI with MC 5w-20. Would this have happended with any syn, only a true Syn, or some syn in between? ...Or would Syn have suffered the same cumulative dirty fate?

I am new to Syn in my auto, just started a vehicle on PP.
 
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Originally Posted By: Vincent_Vega
How many mile are on your truck? This is the first negative comment that I have seen against MC, especially with that OCI.


83K. I don't know if it is a negative. Fairly normal for dino and a v8 to have some crud accumulation. Would a syn do any better?
 
Synthetic oil has more cleaning ability than dino, but if your PCV was not working that could be the main problem. Now that you have replaced the PCV its time to clean the engine and Auto-Rx is the only game worth playing.

Get a couple of bottles of Auto-Rx, a few Supertech filters and some 5QT containers of name brand but cheap oil at Walmart and go to town.
 
I am going to do the Auto Rx, and I do no blame the MC oil. Yes, many short trips. Just wondering if dino oil plugged the PCV in first place. I guess I should have asked would a true syn oil not leave sludge, varnish and crud if mixed with combustion gases, moisture & heat....or Is the "cleanliness just hype". That Mobil One in a frying pan is still stuck in my head!

Years working on all my toys with dino, and I noticed recently how Rotella T syn cleaned up some old bikes crankcases. Granted, Rotella not a pure syn, and HDEO probably has high detergent for diesel soot. However, Syns would be an advantage if they ran cleaner, regardless of shearing an wear. I just have no long term experience with them, to know if they do run "cleaner"
 
I've bought many old bikes where the oil sight glass was completely sludged up and invariably it clears up within a few hundred miles running on any new oil.

I'm sure the synthetic cleanliness is not hype. I just don't know how to evaluate it as a factor in normal real-world use. In my experience any oil will keep an engine clean, unless maybe the engine has problems with PCV systems, etc. On the other hand, what you can't see, behind the rings and near the exhaust valves and so on, I can't say for sure it doesn't make any difference.
 
Synthetic oil simply does not crud up at such short intervals - even if the breathing system is having issues. I have driven all sorts of cars with known histories of crankcase breather or flame trap clogging issues. Switching to synthetic oil positively 100% eliminates any worry. Oh I check the breathing apparatuses every 50,000-100,000 miles, but even that is a waste of time....maybe a little thin oil film, but never one bit of crud.
 
I think that the key places syn helps to keep cleaner may be the area of the ring lands of the pistons and other areas subject to high heat. That being said, I am all for the use of ARX for cleaning and keeping clean regardless of oil or interval used. Like-new performance at all times would be one benefit. Use of synthetic oil would be secondary in importance IMO after lots of personal experience with ARX.
 
Originally Posted By: Pablo
Synthetic oil simply does not crud up at such short intervals - even if the breathing system is having issues. I have driven all sorts of cars with known histories of crankcase breather or flame trap clogging issues. Switching to synthetic oil positively 100% eliminates any worry. Oh I check the breathing apparatuses every 50,000-100,000 miles, but even that is a waste of time....maybe a little thin oil film, but never one bit of crud.


Might I invite you to step over to the better Swedish brand, SAAB? PCV issues are the MAIN reason the 9-5 engines crash and burn. Even running M1 0W40....
whistle.gif
So never say never...
crazy2.gif


But yes, synths are still usually much cleaner long term.
 
Nope, the PCV isn't even plugged, it was just an inadequate design for the amount of crankcase pressure. The vapors re-condense and form acids and all sorts of other goodies, rapidly depleting the oil's additive back and then attacking the base. Additionally, they deteriorate the hose rubber at a rapid pace and decayed rubber mixed with harden carbon deposits block the oil pickup screen, starving the engine.
 
Would running 5w 2o Amsoil or PP, or even 5w 30 syn maxlife clean it up? I hear the ARX army, I am just a little leary of additives.
 
Originally Posted By: Cmarti
Would running 5w 2o Amsoil or PP, or even 5w 30 syn maxlife clean it up? I hear the ARX army, I am just a little leary of additives.


AutoRX is not an additive. It makes no changes to the oil's chemistry.

There is absolutely no reason to doubt AutoRX. It has been PROVEN to work and have absolutely no harmful effects. It even has a money back guarantee. There is absolutely no other product that will do what AutoRX can do.

Any oil and AutoRX will not only keep an engine cleaner than any dino or synthetic oil alone, it will also maintain engine efficiency better than any dino or synthetic alone.
 
Originally Posted By: Cmarti
Would running 5w 2o Amsoil or PP, or even 5w 30 syn maxlife clean it up? I hear the ARX army, I am just a little leary of additives.


Oil alone won't clean an engine.
 
Well, it depends on what you're trying to clean. If you have sludge from old oil that was used up, a fresh batch will usually clean that up very well. Burned-on carbon deposits would be a different matter.
 
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