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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > anyone running 0w40 Royal Purple Oil?



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      11-10-2008, 01:19 PM   #1
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anyone running 0w40 Royal Purple Oil?

time for an oil change and feel like trying something other than the 0w40 Mobil 1 I normally use. Anyone tried the same in Royal Purple?

also going to try their manual tranny fluid out.
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      11-10-2008, 01:22 PM   #2
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Let us know how it feels. I am a Redline whore, I have tried Mobil before (on last car) and it seemed better than stock but Redline was another bump up from Mobil.

I hear good reviews about Royal Purple.
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      11-10-2008, 01:45 PM   #3
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Quote:
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Let us know how it feels. I am a Redline whore, I have tried Mobil before (on last car) and it seemed better than stock but Redline was another bump up from Mobil.

I hear good reviews about Royal Purple.
what redline are you running? That was my other option.
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      11-10-2008, 01:49 PM   #4
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5W30 in engine. Haven't changed tranny or diff yet. In the Z I ran MT90 (GL4) for the tranny because of the brass synchro's (couldn't use GL5) and I used 75W90 in the rear diff (GL5) and I made sure it was LSD safe. With this car I think GL5 would be fine all the way around and it doesn't have an LSD either.
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      11-10-2008, 01:51 PM   #5
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how come 5w30?
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      11-10-2008, 01:56 PM   #6
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amsoil is a good choice... RP had mixed results from i believe blackstone labs for the G35's, not sure about the 335i's though. i personally use motul 300v 5w-40 which is a bit pricy.
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      11-10-2008, 01:58 PM   #7
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Quote:
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how come 5w30?
could use 10W30 in the summer if it is really hot and you are at the track alot. I have yet to exceed 250F in my car with 5W30.
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      11-10-2008, 02:07 PM   #8
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I changed from stock oil to Mobil 1 ESP 5w/30 and did not notice any difference between them. I changed Mobil's to Redline 5w/30 recently. I selected this viscosity because it has better fuel economy (at least in theory) and I trust RL's film strenght so I can allow lower viscosity.

One thing ws noticed: valve train sounds quieter which I think is a good thing (it has happened in several cars where I have poured RL). Second effect was that engine felt kinda "slicker". Of course these oils should be compared same day, both as new condition and preferrebly as an X/Y test configuration.

For gearbox I put RL MTL which was a great improvement over stock oil. It is a pleasure to change gears afterwards. Especially 2nd gear has been a little difficult to engage sometimes before.

For diff I put RL 75w/90. Together these drive train oil changes felt as car would have rolled a little better but again, the factors apply I mentioned before.

After all, it doesn't hurt to change oils often. High quality synthetics are preferred (like OEM) but it seems that ester based oils (RP/RL/some Motuls) are still improvement over these.
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      11-10-2008, 02:08 PM   #9
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i haven't seen any higher temps than 245 with castrol 5w30
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      11-10-2008, 02:09 PM   #10
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Quote:
Originally Posted by 07-335XI View Post
amsoil is a good choice... RP had mixed results from i believe blackstone labs for the G35's, not sure about the 335i's though. i personally use motul 300v 5w-40 which is a bit pricy.
Same here, fan of the Motul
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      11-10-2008, 02:58 PM   #11
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i use 5w30 royal purple and i absolutely love it, the car runs smoother a little bit cooler. overall the car runs more healthier.
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      11-10-2008, 03:48 PM   #12
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how many miles are redline/royal purple good for?
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      11-10-2008, 04:59 PM   #13
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i use royal purple. ive gone 2 cycles already. its pretty expensive but worth it. i love how my car feels when i have royal purple in there.

i usually change every 3k-5k
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      11-10-2008, 10:10 PM   #14
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I change every 5k with Redline, costs about $100 to buy oil + filter, and I get it changed for free.
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      11-10-2008, 11:05 PM   #15
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has anyone use Amsoil oil?
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      11-11-2008, 12:38 AM   #16
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Stay away from Mobil

I don't mean to start a "which oil is better" topic - but I used to run Mobil 1 in my E36 M3. When I took it into a great local mechanic who runs some great cars (totally overhauled M1 among them) he threw the book at me for using Mobil. Royal Purple is good, I've heard good things about Redline but have only used it in my trans/dif.
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      11-11-2008, 10:01 AM   #17
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Use redline exclusively in my M3, love this stuff. Have though about Royal Purple on some occasions. Perhaps I'll give it a try during next oil change.
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      11-11-2008, 10:02 AM   #18
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I am going to change my oil soon... I am going to go with Royal Purple 5-30... they sell it at wal-mart!!! haha
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      11-11-2008, 10:09 AM   #19
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I will chime in on the Mobil1 as well, although it worked ok (better than stock feel) on my 350Z, it did have a tendancy to leave black smoot all over the tailpipes and back of my car. Once I switched to Redline the black smoot went away and it felt a little better still. Just an observation, not sure why or if it was just a coincidence of some sort.
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      12-02-2008, 07:37 PM   #20
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can someone guide me

I found some Royal Purple engine oil on Amazon

is there a particular one I have to use? or any RP 5w30 ?

The name of the one I found is..."Royal Purple Street Synthetic Motor Oil - SAE 5w30"
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      12-02-2008, 07:58 PM   #21
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I'm a little dumbfounded on the negativity with Mobil1.
I put the 0w40 in and it fealt great.

I would be very surprised if it were to be bad for the engine.
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      12-02-2008, 09:09 PM   #22
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so royal purple 10w40 of 10w 30 would work fine?
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