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Thread: Engine Oil BEST suited for a 535i

  1. #1
    Join Date
    Dec 2005
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    162

    Default Engine Oil BEST suited for a 535i???

    To my fellow 535ers, what engine oil do you use for your engines?? I'm currently using Castrol Magnatec 10w-40 for my 89,xxxkm (or 55,xxx miles) 535. Ambient temperature here is 30-33 degrees Celsius and could peak at 36 degrees Celsius. Most of the time, it experiences normal city driving situations but at times with spirited runs on the highway but not that often though. I religiously change my oil every 4,000 - 4,500 kms. I'm planning to keep my car for a long time..
    Last edited by sneekens; 07-17-2007 at 09:29 AM.

  2. #2
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    Apr 2006
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    Chicago, Il. U.S.A.
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    You're already doing the right thing. 36c, where are you?
    EDIT genphreak is right on. 10w-40, which I always used in my M30s, is recommended only up to 10c. 20w-50 or even staight 40 is what is recommended in the owners book for '89 M30s. The lighter oil never harmed mine but your temps are typically higher.
    Last edited by Ross; 07-18-2007 at 08:47 AM. Reason: I'm wrong
    "The gas pedal wouldn't go to the floor if it weren't meant to be there"

  3. #3
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    Philippines...

  4. #4
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    Jan 2006
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    Connecticut, USA
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    I run 15-40 in New England

    Change every 3k miles

    M30's like it nice and thick, make sure you let it heat up to full temp before getting too into it
    1990 Islandgrun 535iM Sedan

    3k oil changes | Euro lights + trim | Eibach/Bilstein | EAT Chip

  5. #5
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    Apr 2006
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    109

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    Amsoil 10w-40 in New England. Again, the M30s like really nice and thick motor oil. You might also want to look into getting a gauranteed group IV or V (true synthetic) like Amsoil. A lot of brands are allowed to sell highly refined dino as synthetic (Mobil 1).

  6. #6
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    Aug 2004
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    Regional NSW, Australia
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    I run Mobil 1 0w-40 in my 3 bimmers, with changes at 8,000 km (5,000 miles).

    Very happy with it and the temps here in Summer get up to 45 C.


    "I'm not the village idiot.
    But when he retires I'm next on the list."

  7. #7
    Join Date
    Dec 2005
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    Thanks for the info guys! A friend of mine uses 20w-50 here but the thing is, he needs to warm the engine up longer... it experiences erratic idle at first but once it gets to temp, everything is fine... Thats why I opt for the 10w-40, as soon as I start my car, it feels like my m30 likes it.. 15w-40 here are designated for diesel engines but still they have the SL rating like those of gasoline engine oils... BTW, how would you know if the oil is too thin? I never had any OIL consumption from the past, so is right to think that my oil can hold up the heat??

    Zeuk in Oz Zeuk:
    Wow!! 45C at ambient is HOT!

  8. #8
    Join Date
    Feb 2007
    Location
    GreenHills East-Philippines
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    Quote Originally Posted by sneekens
    To my fellow 535ers, what engine oil do you use for your engines?? I'm currently using Castrol Magnatec 10w-40 for my 89,xxxkm (or 55,xxx miles) 535. Ambient temperature here is 30-33 degrees Celsius and could peak at 36 degrees Celsius. Most of the time, it experiences normal city driving situations but at times with spirited runs on the highway but not that often though. I religiously change my oil every 4,000 - 4,500 kms. I'm planning to keep my car for a long time..

    Ummm... migs that friend you where describing would'nt happen to be me??would it?hehehe i'm changing back to castrol... this time i'd buy from you

    HID 5000k low 3000k fogs
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  9. #9
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    Nov 2006
    Location
    Maryland
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    703

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    Castrol GTX High Mileage 10W40

    I've used a product call RESTORE, it's supposed to restore compression and reduce oil consumption. I have felt a small increase in power. Havent noticed anything on the oil consumption yet.

  10. #10
    Join Date
    Dec 2003
    Location
    NW GA
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    261

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    I had been running Castrol GTX 10W40 in the winter months and 20W50 in heat of summer in my M30, but for the past couple of years I've only used 10W40.
    1990 535i 5-sp., except for 16" M-Contours, cd deck, and clear corners, completely stock. 226k and running strong

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