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BMW 3-Series (E90 E92) Forum
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Royal Purple vs Redline 75w-90?
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| 10-28-2019, 11:06 PM | #1 |
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Luke McMullen
29
Rep 114
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Royal Purple vs Redline 75w-90?
Changing the diff fluid on my 2007 e92 335i soon. Wondering your guys opinions on either one? They’re pretty much the same price, I know some guys swear by redline and others swear by royal purple. Give me your opinions and give some reasoning too!
Also, if anybody knows the change interval for the diff fluid on this car? I’m at 110k and I’m not sure if it has ever been changed or not. I’ll keep you guys updated on the condition of the old fluid and tell you guys how the new fluid is working, with whichever fluid I choose. |
| 10-29-2019, 09:38 AM | #2 |
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Brigadier General
 
622
Rep 3,198
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Drives: E92 325i MSport Coupe
Join Date: Apr 2012
Location: UK South East
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I'd change every 50K. Also worth considering...Amsoil Synthetic Severe Gear Oil 75w-90.
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E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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| 10-29-2019, 09:40 AM | #3 |
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Clean is the new cool, keep it that way.
808
Rep 1,685
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RP is crap, Redline if you must but OEM is fine. I use Motul.
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2011 335i, FBO, N55+ Turbo, full E85, S55 intercooler, etc.
2015 X5 35i Xdrive |
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| 10-29-2019, 05:10 PM | #4 |
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Major General
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Drives: 2007 Black/Black 335i e90
Join Date: Apr 2011
Location: Holly, MI
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I use Amsoil through out the entire car. I have a 5 year membership. You can buy them in 1 year increments. Anyways, you get 25% off the sticker price.
No complaints here |
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| 10-30-2019, 06:55 AM | #5 |
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Hoonigan
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Drives: '09 328i, '98 Wrangler
Join Date: Dec 2016
Location: Connecticut
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I'd also change it every 50k. I have RedLine 75w90 in mine, and have used RedLine in my Jeeps for years without issue. Pretty much any 75w90 gear oil should work with 50k mile intervals.
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| 75w-90, diff fluid, differential fluid, redline, royal purple |
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