Nissan 370Z Forum - View Single Post - Which oil to choose? Oil gurus, please, chime in!

Jordo! · 07-09-2014, 07:59 AM

1. Anything entitled "x aint y" is as likely to as scientifically grounded and rigorous as a cake recipe.

2. The bearing wear tests they use reveal little about internal engine component wear. Slap some heavy bearing grease on those things and they will survive the tests longer -- your engine, not so much.

3. Multiple independent UOA's on the same (or highly similar) engine, run under the same or highly similar conditions will give you better data on their performance characteristics.

4. At the end of the day, notwithstanding "snake oils" like Slick 50 (which makes use of small particles that have been found to actually accelerate engine wear...), most ASE oils will provide about equal protection, with variance mainly cropping up in regard to high power, long term application -- as in endurance racing, not daily driving, or in data on whether engines hold together for 200 K miles vs, say, 400 K miles, and also data on recommended OCI's, which large scale studies by the state of CA for fleet vehicles has shown to be about double what is typically recommended (the ol' 3500 mile rule-of-thumb) when synthetic over dino oil is used.

5. Do not make decisions on the veracity of claims on faith if they can be meaningfully and logically empirically investigated -- save that kind of speculation for whether or not to leave out cookies for Santa Claus -- make them based on your best assessment of the logic of the testing and merits of the gathered and analyzed data. These methods and data are not relevant to selecting engine oil -- period.

07-09-2014, 07:59 AM	#42 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	1. Anything entitled "x aint y" is as likely to as scientifically grounded and rigorous as a cake recipe. 2. The bearing wear tests they use reveal little about internal engine component wear. Slap some heavy bearing grease on those things and they will survive the tests longer -- your engine, not so much. 3. Multiple independent UOA's on the same (or highly similar) engine, run under the same or highly similar conditions will give you better data on their performance characteristics. 4. At the end of the day, notwithstanding "snake oils" like Slick 50 (which makes use of small particles that have been found to actually accelerate engine wear...), most ASE oils will provide about equal protection, with variance mainly cropping up in regard to high power, long term application -- as in endurance racing, not daily driving, or in data on whether engines hold together for 200 K miles vs, say, 400 K miles, and also data on recommended OCI's, which large scale studies by the state of CA for fleet vehicles has shown to be about double what is typically recommended (the ol' 3500 mile rule-of-thumb) when synthetic over dino oil is used. 5. Do not make decisions on the veracity of claims on faith if they can be meaningfully and logically empirically investigated -- save that kind of speculation for whether or not to leave out cookies for Santa Claus -- make them based on your best assessment of the logic of the testing and merits of the gathered and analyzed data. These methods and data are not relevant to selecting engine oil -- period. __________________ Enjoy it. Destroy it. Last edited by Jordo!; 07-09-2014 at 08:07 AM.