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Uh oh, Here We Go Again!

Yes you throw your money away if you do not use synthetic oil it is about the sheer strength

Key Advantages of Synthetic

1) Volatility: Synthetics do not evaporate as readily as Petrol. based. Usually, synthetic lubricants are based on 1 molecule with a flat distillation curve.

2) Better viscosity versus temperature behavior Thin less as they get hot Thicken less as they cool

3) better oxidation stability

4) Synthetic Oil has 10% better heat transfer than Petroleum based lubricants.

Viscosity Index Improvers

Rubber and Plastic Polymers

Start with a base of straight weight Oil. Then add a polymeric thickener. When hot, the long polymer chain is really moving around, causing the oil to flow less. When cold, the polymers stick to each other, essentially coming out of suspension. The polymers are stable up to about

210 F, where they start to break up. The drawbacks to VI polymers is that they can cause engine dirt because of their low shear strength.

Viscosity A B C D

High | ' ' ' ' | ' ' ' ' |* ' ' ' ' | \ ' ' ' ' | *- ' ' ' ' | *\ ' ' ' ' | *- ' ' ' ' | *' ' ' ' | *- ' ' ' | ' *\ ' ' ' |-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- | ' *-*\ ' ' ' | ' *\*-*\*-*\*-*\*-*\*-*\*-*\*-*\*-*\ | ' ' ' ' Low |_____________________________________________________________ Low High Sheer Rate

A Shear at Piston Rings B Shear at Main Bearings C Shear at Cylinder Wall D Shear at Connecting Rod Bearings

-+-+ Viscosity of a Straight Weight Oil (Petro. Or Synthetic)

*\*- Viscosity of A MultiGrade Oil (Base with VI polymers)

What this chart shows is that a straight oil has the same viscosity regardless of shear rate. However, as the shear rate increases, the shear breaks down the VI polymers, and multigrade oils have less actual viscosity at the localized high shear rate area.

The weak link is the rod bearings and Cam, in terms of rate of shear. There is less friction at the piston rings. Anti Wear is much more important at the cam.

Coasty

Reply to
Coasty
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If you want to really know follow the link and make up your own mind

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are names so because they are go with synthetic. Coasty

Reply to
Coasty

There is no such thing as "too late to switch to synthetic". Unless you want to give old wives tales (or old techonophobes tales in this case) undue credit.

FWIW cars I've "swtiched":

88 YJ with 142k miles... now 168k three years later 92 cherokee 139k 95 GT Mustang 64k got to 100k before traded 97 Toyota Tacoma 216k now 264k 01 Cobra Mustang 5k now 29k

Of these I still have all but the GT (traded in for the cobra) all got Mobil 1, and none have any problems that are remotely oil related.

Least of all leaks and degraded rubber seals that have been wrongly attributed to modern synthetic oils.

Reply to
Simon Juncal

At what interval do you change the oil?

"Simon Juncal" wrote in message news:6dednVxC3NhWDADZnZ2dnUVZ snipped-for-privacy@rcn.net...

Reply to
billy ray

Reply to
L.W.(Bill) Hughes III

Reply to
L.W.(Bill) Hughes III

Does it really matter if you chemically join small molecules to the perfect size or chemically cleave larger molecules to the perfect size?

The end result is a superior lubricant.

Reply to
billy ray

Reply to
L.W.(Bill) Hughes III

Reply to
Simon Juncal

You could not be more wrong Bill it depends on the manufacturer some are ester or polymer based they do not come from crude and are 100% synthetic. This has happened in the past couple of years I have a friend who is a chemical engineer that works on the development of new oils. They are now using them in aircraft, NASA, military and in the Antarctic where the oils will flow at minus 60 degrees F. They are on the market for consumers Redline and AMSOIL are in the front running with no crude base at all. There 3 other Manufacturers that are overseas that have developed a 100% synthetic oil with no petroleum or hydrocarbons in them. And to answer your question it AIN'T PETROLEUM.

Coasty

Reply to
Coasty

Reply to
L.W.(Bill) Hughes III

Reply to
L.W.(Bill) Hughes III

Reply to
L.W.(Bill) Hughes III

I go by a lazy 3000 mile rule... at 4000 miles I remember I wanted to change it at 3000.

Reply to
Simon Juncal

Um... did you read his whole sentence there or did you take a nap before you finished it?

Just read past the first line which you didn't understand.

Obviously you're totally unequipped to argue with his post so you ask him an IRELIVANT question, that he actually already answered.

Reply to
Simon Juncal

Reply to
L.W.(Bill) Hughes III

No plant animal or mineral in them they have been developed from a molecular level. Just because a molecule originates from plant, animal or mineral does not mean it cannot be synthesized. Once synthesized then it no longer comes from plant, animal or mineral it becomes fully synthetic and the plant, animal or mineral is no longer needed to create more of the same.

Coasty

Reply to
Coasty

Reply to
L.W.(Bill) Hughes III

Actually, it appears a new fundamental particle may have been discovered recently. Which has butkus to do with the fairly simple chemistry of making the innards of oils from whatever source happens to be available and cost effective. Could be made from natural gas, greasebush, coal, peanuts, or soylent green--just happens to be most cost effective to crack crude to the raw constituents then paste em back together with a few metallic compounds that didn't come from oil.

L.W.(Bill) Hughes III proclaimed:

Reply to
Lon

Thus the fundamental wrogness. The oil is not refined, it is pasted together from raw materials that could have as easily come from peanut shells or fish--at greater cost, which is why most of the raw ingredients are cracked from crude rather than dead horses.

L.W.(Bill) Hughes III proclaimed:

Reply to
Lon

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