[QUOTE]Originally posted by wc_one
[B]

Originally posted by StwoK

You are using Mobil 1 which is a synthetic oil and when compared to a normal mineral based oil, Mobil 1 has an operating temperature about 100 degrees F higher then normal oil.
FALSE

 

[QUOTE]Originally posted by StwoK
[B]

I never said the additives were different between the different oil base stocks. Get a clue!

 

b8b88 was conserned about heat and its effects on the synthectis oil he was using. Synthetic oil provides better protection in just about every condition.

wc_one we may be getting a little off topic here, so I'll respond to just several of your points.

Whereas 10W-30 ( which Honda recommends ) Mobil 1 has fewer polymers because the molecular chain can be built in the lab to cover the more narrow viscosity range. Fewer additives, better protection.
wc_one said "First of all, polymers are not additives. Anyway, here you are saying synthetic oil additives are different from conventional oil additives."

Most people think of additives as just detergents and a anti-wear formula added to a quart of oil. Polymers are also added. Polymers are viscosity index improvers, they cause the oil molecular chain to coil or uncoil in response to the oil temperature. Companies like AMSOIL can formulate their 10W-30 and 15W-40 with no viscosity index improvers but uses some in the 10W-40 and 5W-30. Mobil 1 uses no viscosity improvers in their 5W-30. Therefore better protection.

And one more thing, the additive package in normal oil will probably not stand up very long with our high RPM engines.
wc_one said "Here you are making the distinction again."

Shear strength is the oil's ability to maintain a protective film between two metal surface. Synthetic oils resist pressures over 3000 psi while petroleum gives up at about 500 psi. If the oil is breaking down, so is the additive package. Where is the protection? This is why I made that distinction.

Also normal oil has a tendency to evaporate faster at high operating temperatures which causes a thickening of oil and reduced protection.
wc_one said "FALSE"

The API stamps their rating on a quart of motor oil. To earn the SF rating back in the 80s, the oil had to pass the Olds III-D test. The test uses an Oldsmobile 350cu. in. V8 engine and ran for 64 hours at a 100hp load with a 300F crankcase oil temperature. This simulated a car pulling a trailer. The test was designed to show the oil's ability to resist evaporation and oxidation. This test showed just how much a petroleum based oil will thicken when heated for long periods! To pass, the oil cannot thicken beyond 375% of its original viscosity. Mobil put their synthetic to the test and went for 128 hrs. Double the normal length. It passed by thickening only 20% (128 hours). Amoco tossed their hat in the ring and ran the same 128 hour test. Amoco's Ultimate 5w-30 also passed showing only an 18% thickening. Two SF rated premium petroleum based oils were also tested beyond the normal 64 hour period. The first oil went 96 hours and then turned solid, the second oil went 112 hours. If oil cannot be pumped, it is considered solid.

You are using Mobil 1 which is a synthetic oil and when compared to a normal mineral based oil, Mobil 1 has an operating temperature about 100 degrees F higher then normal oil.
wc_one said "FALSE"

Petroleum based oil will handle around 300 degrees F. Mobil 1 and Amsoil have a working temperature to about 400 degrees F, while Red Line will handle another 50 degrees F (a total of 450 degrees F). In each case a 10W-30 oil was used for comparison.

I hope that I've addressed the concerns of b8b88. Honda recommends 10W-30 motor oil and if a synthetic oil is used, b8b88 will give the engine greater protection when heat is a concern.

I think have said enough .........

 

thank you all for the answers