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Can synthetic oils prevent the onset of tiredness for a small block?

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anyone who runs anything thinner then 10w-30 in winter and 10w-40 in summer in an old chevy small block is a fool in my opinion.

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Anybody who runs 10W-40 conventional in anything is a fool in my opinion. Do you know anything about oil? Do you realize the amount of additives it takes to make 10W-40?

10W-30 in the winter? Below zero? Seriously? You realize that the majority of wear occurs as startup, right? What basis is there for running 10W-30 in winter when 5W-30 provides better cold startup protection and is the same, "weight" when hot?

I'm not trying to argue here or anything, but your thoughts as to what weight should be run in what engine sure don't seem to have much basis in fact.

Oh and I run 5W-30 year round in my trail rig and it still has about 40 pounds of hot idle oil pressure.
 
Hmm, most diesels run 15W40 year round, and they for the most part last much longer than gas engines. Am I a fool for running 15W40 in the winter?
 
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Hmm, most diesels run 15W40 year round, and they for the most part last much longer than gas engines. Am I a fool for running 15W40 in the winter?

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No, because that is what is specified for an engine like yours. That's what I'd run there too, but there are certainly reasons why lighter weight oils are specified for gasoline engines and cold weather.

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Although 15W-40 might be ok in our Illinois weather, I would think that there are provisions to run thinner oil in Diesels in climates where the temperature is lower for a longer period of time than here.
 
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Mobil 1 is one of the poorest performing synthetics on the market. It's good, but compared to other synthetics, it's really not all that great.

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Tim..........Prove it!!!!!!!!!!!!!!!!!!!!! /forums/images/graemlins/deal.gif
 
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Mobil 1 is one of the poorest performing synthetics on the market. It's good, but compared to other synthetics, it's really not all that great.

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Tim..........Prove it!!!!!!!!!!!!!!!!!!!!! /forums/images/graemlins/deal.gif

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Go to www.motoroilbible.com, buy the book, and read all the specs. I bought the book, printed it, and kept it on my counter to show my customers when I was selling parts. It can be easily proven.

Mobil 1 is far better than any conventional, but falls short of every other synthetic on the market compared to the others.

I had a CD copy of the book but I lost it. Either way that guy is convinced that his book is the most comprehensive book on motor oil that can be found anywhere, and he will GLADLY refund your money if you're not 100% satisfied. /forums/images/graemlins/waytogo.gif
 
I thought it took quite a few additives to make ANY multi-viscosity oil, maybe i don't know anything about oils in your opinion, and no i did not read a book on them. All i know is what works in my real world personal experiances. While those experiances may not be enough to sway you from your practices, i will continue to go with what works well for me. Also from what i've wittnessed first hand, my 15w50 Mobil 1 protects during cold start up just fine, if i was worried about additives i would run straight 30 dino oil. I figure the man made synthetic could be considered PURE additives, and it works BEAUTIFULLY for the junk i drive and wheel

BTW: i will check out that website, not that i have any plans of changing what works for me, but i do beleive you can never have enough information
 
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And you beleave everything you read???????? Chump....

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The specs are provided from the fact sheets that the oil companies print themselves.

Be skeptical all you want, you can get this same information from the oil company by writing to them. They will send you a fact sheet about every product they make.

His book just puts it all into a neat little chart you can print out.

He includes the source for everything.

Which brand of oil is best will always be a matter of opinion anyway.
 
The problem is, mobil 1 is still better than quaker state as well as castrol Syntec. You can compare numbers all you want. VOC, ash, pour points- Syntec isnt even made from synthetic base stock (and I hear the new mobil one also isnt from the same grade of PAO base stock).

Hence my previous post about changing when I finished using my stock.

There is also sometihng about Rotella synthetic not being from as good a synthetic base stock as Delvac 1- Hence the significant price difference (Almost DOUBLE for D1).

My thing is, if I can prevent normal wear and tear as much as possible, I should be able to drive my truck forever- all else being equal, and if the rust monster doesnt bite it first.

Ok, wear at start? Believeable, but they say oil keeps a film- Which means the properties of sticking as well as properties of how fast cold flow is will determine the seconds or minutes it was before the bearings and rings got oil to it.
 
I agree with that also. There is no definition as to what is, "Synthetic".

However, I disagree that being a lab created synthetic vs. a highly refined petroleum base stock makes one better than the other. In my opinion, the finshed product is what matters, whether truely, "synthetic" or not.
 
But under the same token- Most synthetics do have a lower pour point and a higher burn point than the BEST conventional oils.
 
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But under the same token- Most synthetics do have a lower pour point and a higher burn point than the BEST conventional oils.

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IIRC Mobil 1's pour point is higher than all the other synthetics in the 5w-30 grade. This does not take away from the fact that it is more than 40 degrees before zero before it fails the pour point test and on average an engine will never see temperatures like this.
 
change ur oil like every 2 weeks and ur engine will last forever

thats what taxi cabs do to keep their cabs running so long.
 
Valvoline makes a synthetic/maxlife blend. All the benefits of synthetics, plus the maxlife additives. Maxlife keeps the gaskets soft and plyable to help prevent oil leaks /forums/images/graemlins/thumb.gif. Gaskets eventually start to dry out, shrink and crack as they age.
 
I would probably run valvoline if they made a max life full synthetic. Until then, I'll just run rotella.
 
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