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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Sun, Feb-26-2017, 03:40:54 PM   #1
Killbot711
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Default Gear oil study

http://www.lastgreatroadtrip.com/wp-...comparison.pdf

Found this while looking for gear oil for the ol' GX470 actually. The study is about 10 years old and I'm sure there will be doubters as to the validity of the test but an interesting read anyways. Very surprised at Royal Purple's performance. Probably won't buy that anymore. Not surprised at Lucas' performance as it always seemed like snake oil to me.
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Old Wed, Mar-01-2017, 01:20:22 AM   #2
epj2.9
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Default Re: Gear oil study

Well, a great reason to avoid Royal Purple is that it seems to be the cause for limited slip carrier bolts backing out. At least, that was the thinking last I checked?
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Old Wed, Mar-01-2017, 03:03:57 AM   #3
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Default Re: Gear oil study

Amsoil ranked number one, having top-ranked in most categories, and the study was prepared for them. All I know is any company would not put out a benchmark study that was prepared for them if it wasn't favorable to them. In IT, independent analyst studies often are pay-for-play and are contorted to show favorable outcomes. I'd imagine a similar mechanical study could be twisted to show favorability based on testing criteria.

Disclaimer: I am, by no means, a mechanical engineer, oil expert, or someone who can absorb or validate the level of technical detail in the report. Just stating the commonalities I have witnessed firsthand in another industry utilizing benchmark studies.
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Old Wed, Mar-01-2017, 04:44:41 AM   #4
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Default Re: Gear oil study

bob is the oil guy + blackstone lab is all you need
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Discussing Gear oil study in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)