Oil Analysis Results
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Post Fiend
Joined: Jun 2001
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From: Running Springs CA
Oil Analysis Results
What gets tricky about viscosity ratings is that the W rating is taken at 40C, which is not very cold. Pour point is a better indicator of cold temperature capablility. There is also a cold cranking viscosity test that some oils publish and some don't, making comparisons difficult. There is also an additive called pour point depressant that is used to get the pour point of conventional oil down. PAO synthetics have a naturally lower pour point and the additive does nothing to further improve it.
There is a forum on www.rotella.com that is moderated by a Shell techie that I think you will find interesting. If Delo were not available, I would not have reservations about using Rotella.
I discovered Delo when I bought the BMW and the owners manual called for 15W40, which I never knew existed. The only 15W40 carried by my nearest parts store was Delo 400 and I have been using it since. I had been using Pennzoil or Valvoline 10W30 or 30 in my cars and trucks up to that point. Somehow, I got way too interested in this subject.
Jim
There is a forum on www.rotella.com that is moderated by a Shell techie that I think you will find interesting. If Delo were not available, I would not have reservations about using Rotella.
I discovered Delo when I bought the BMW and the owners manual called for 15W40, which I never knew existed. The only 15W40 carried by my nearest parts store was Delo 400 and I have been using it since. I had been using Pennzoil or Valvoline 10W30 or 30 in my cars and trucks up to that point. Somehow, I got way too interested in this subject.
Jim
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Joined: May 2002
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From: Chicago Area
Oil Analysis Results
40 degrees C? If I remember the conversion properly, that's 104 degrees F! That's the "W" rating?? Got to be 40 degrees F, right? As you say, even that is not very cold.
The Shell Rotella T synthetic is CH-4/SL rated. Don't know when the CI-4 was released, but I don't see it at the store yet.
MrBSS
The Shell Rotella T synthetic is CH-4/SL rated. Don't know when the CI-4 was released, but I don't see it at the store yet.
MrBSS
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Post Fiend
Joined: Jun 2001
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From: Running Springs CA
Oil Analysis Results
>40 degrees C? If I remember the conversion properly, that's
>104 degrees F! That's the "W" rating?? Got to be 40
>degrees F, right? As you say, even that is not very cold.
OK. I found a copy of SAE J300 (2001), which defines viscosity grades. The 40C measurement published by all of the oil companies is not in the spec, maybe it was used a long time ago or it is still part of a mil spec for government use.
Each W grade has a cranking and pumping viscosity limit at a different temperature.
Grade Cranking/Pumping
0W = -35C/-40C
5W = -30C/-35C
10W = -25C/-30C
15W = -20C/-25C
20W = -15C/-20C
25W = -10C/-15C
It is interesting to note that there is a 150C test requirement that never gets published in the spec sheets, only the 100C figure.
>The Shell Rotella T synthetic is CH-4/SL rated. Don't know
>when the CI-4 was released, but I don't see it at the store
>yet.
CI-4 was only released this month! It will take a while for products to be tested, certified and labeled. The jug of Delo that I have says that it meets the reqirements of the upcoming CI-4 standard.
Jim
>104 degrees F! That's the "W" rating?? Got to be 40
>degrees F, right? As you say, even that is not very cold.
OK. I found a copy of SAE J300 (2001), which defines viscosity grades. The 40C measurement published by all of the oil companies is not in the spec, maybe it was used a long time ago or it is still part of a mil spec for government use.
Each W grade has a cranking and pumping viscosity limit at a different temperature.
Grade Cranking/Pumping
0W = -35C/-40C
5W = -30C/-35C
10W = -25C/-30C
15W = -20C/-25C
20W = -15C/-20C
25W = -10C/-15C
It is interesting to note that there is a 150C test requirement that never gets published in the spec sheets, only the 100C figure.
>The Shell Rotella T synthetic is CH-4/SL rated. Don't know
>when the CI-4 was released, but I don't see it at the store
>yet.
CI-4 was only released this month! It will take a while for products to be tested, certified and labeled. The jug of Delo that I have says that it meets the reqirements of the upcoming CI-4 standard.
Jim
Junior User
Joined: Aug 2002
Posts: 54
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From: naples usa
Oil Analysis Results
Mr. BSS,
I wrote to Shell Tech Support regarding CI-4 and composition and here is there response:
"Currently ROTELLA T Synthetic meets API Service Category CH-4
requirements. Look for an upgrade to CI-4 performance shortly. It is not ester-based."
I wrote to Shell Tech Support regarding CI-4 and composition and here is there response:
"Currently ROTELLA T Synthetic meets API Service Category CH-4
requirements. Look for an upgrade to CI-4 performance shortly. It is not ester-based."
Senior User
Joined: Sep 2002
Posts: 241
Likes: 0
Oil Analysis Results
Yes,chevron supreme is good oil.In fact,I think Chevron developed the modern hydrocracking/Isodewaxing processes used by most major oil companies,in the mid 1980s.They developed the technology and then sold it to some of the other oil companies to promote it as a significant improvement in universal motor oil quality.
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