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Old 12-01-2017, 10:57 PM   #26
benski
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I've heard that Schaefer is good oil as well. Me, I'll stick with my Amsoil. Once a year changes, 3x/year filter changes. Oil and engine technology have improved greatly since the 1950s and 60s.
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Old 12-03-2017, 09:42 PM   #27
84B23F
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Quote:
Originally Posted by John V, outside agitator View Post
Have you ever rebuilt correctly a car engine?
Last I knew, there are only a few machine shops, here and there, that can do

(1) "correct" boring/milling, but
(2) precise mating for part tolerances aren't always achieved.

As a side note, Honda, for instance, used exact sized bearings to mate on crank for years.

Back to the topic, Via Amsoil...notice their definition of "mechanically sound," which is my point about doing more frequent oil changes with older engines that are not choice.

AMSOIL Signature Series 0W-30 Synthetic Motor Oil is recommended for extended drain intervals in unmodified

(1) mechanically sound gasoline fueled vehicles as follows:

• Normal Service – Up to 35,000 miles or one year, whichever comes first.
• Severe Service – Up to 17,500 miles or one year,

"Mechanically sound engines are in good working condition and do not, for example, leak oil or consume excessive amounts, are not worn out, do not overheat, do not leak anti-freeze and have properly working emission control systems. "

Doing more frequent oil changes with older engines might assist in removing deposits on oil rings, btw. Also, I aways do hot oil changes, after driving 30 or so miles, then park vehicle, and change oil. All the oil pans I have removed are clean inside with this hot oil change method.
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Old 12-04-2017, 09:01 PM   #28
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API comes out with new harder and harder tests ...
VOLATILITY CHARACTERISTICS NOACK VOLATILITY ASTM D D-5800

"When an engine oil comes into contact with the high temperature zones in the engine such as the turbocharger, cylinder walls, valves and the under under-crown and ring belt area of the pistons it can begin to evaporate.

Evaporation of the engine oil can contribute to oil consumption in an engine and can lead to a change in the properties of the engine oil and the formation of deposits on critical engine parts."
=================

15% is the maximum spec for this standard

On AMSOIL Signature Series 0W-30 Synthetic Motor Oil, their spec is 8.65%

Hence, cheaper oils may be "lost," due to evaporation.

I'm not suggesting buying high dollar oils, but frequent oil changes with older engines. As noted, this might also clean the rings with time.
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Old 12-08-2017, 09:22 PM   #29
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Footnote: Comparison oil tests of 10w30

NOACK Volatility.

Measures the evaporative loss of lubricants in high temperature conditions. The higher the number, the thicker the lubricant will become. API SL and GF-3 specs allow for a 15% evaporation limit. In this test, obviously, lower is better. Syns almost always have an advantage due to their monomolecularity.

Results for this test (% weight loss):

Amsoil: 4.86
Vavoline SynPower: 7.03
Castrol Syntec: 7.77
Quaker State Synthetic: 7.80
Pennzoil Synthetic: 8.15
Mobil1: 8.92
Castrol GTX Drive Hard: 8.93
Quaker State Peak Performance: 10.63
Mobil Drive Clean: 10.83
Pennzoil Purebase: 10.93
Valvoline: 12.18
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Old 01-04-2018, 11:05 PM   #30
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Originally Posted by 84B23F View Post
Footnote: Comparison oil tests of 10w30

NOACK Volatility.

Measures the evaporative loss of lubricants in high temperature conditions. The higher the number, the thicker the lubricant will become. API SL and GF-3 specs allow for a 15% evaporation limit. In this test, obviously, lower is better. Syns almost always have an advantage due to their monomolecularity.

Results for this test (% weight loss):

Amsoil: 4.86
Vavoline SynPower: 7.03
Castrol Syntec: 7.77
Quaker State Synthetic: 7.80
Pennzoil Synthetic: 8.15
Mobil1: 8.92
Castrol GTX Drive Hard: 8.93
Quaker State Peak Performance: 10.63
Mobil Drive Clean: 10.83
Pennzoil Purebase: 10.93
Valvoline: 12.18
The test determines oil loss at 250 degrees C, not F, over an hour. I have yet to see the OT on my wagon get above 232 degrees F. I wouldn't put much emphasis on this test in for B230F that's gently driven.
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