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Thread: oil question

  1. #1
    Join Date
    Feb 2006
    Location
    Horsham PA
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    90

    Default oil question

    I thought I'd try I thicker oil to quiet the engine down more (approaching 200,000 miles), so I think I'm gonna try Royal purple 20w50.
    I originally used M1 0w-40, now royal purple 10w-40. The RP is much quieter/smoother than the M1 was.

    My question is will RP 20w-50 be too thick for the m60? I also thought about using M1 15w-50 (the extended performance i think its called?) but apparently M1 isn't very good anymore and its not even a true synthetic now.

    anyone use rp 20w-50 in their 540? comments/suggestions?

  2. #2
    Join Date
    Mar 2005
    Location
    Long Beach, CA
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    2,563

    Default

    I use Mobil 1 15w-50

    Ralph Mendoza Jr. - Long Beach, CA

  3. #3
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    Feb 2004
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    4,894

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    There we go again... not "true" synthetic.... In any case, no it is not too thick... the manual originally calls for 20W50 dino oil.

  4. #4
    Join Date
    Apr 2006
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    109

    Default

    Quote Originally Posted by Tiger
    There we go again... not "true" synthetic.... In any case, no it is not too thick... the manual originally calls for 20W50 dino oil.
    What is the truth with this? I've read so many conflicting opinions on the matter. Is Mobil 1 still good oil? Does the 10w-40 "high mileage" stuff really destroy your engine? There have to be more myths and misconceptions about motor oil than anything else in the world and it's impossible to get good information about it.

  5. #5
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    Feb 2004
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    4,894

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    I really don't know the truth. Nothing destroys the engine... exacty on your last statement... even on bobtheoilguy website.

  6. #6
    Join Date
    Oct 2006
    Location
    NEPA
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    936

    Default

    i use shell rotella synthetic 5w-40 in my 540i. its cheap and is good oil.

    my 540i has a little lifter noise in the morning or after sitting all day at work. but after a few minutes it goes away. i dont know if this is a bad thing or normal.
    Mark

    1999 M3 Cosmos Black/ Black 78k
    1994 540i Oxford Green/ Silver Grey Sold @ 133k
    1995 M3 Arctic Silver/Black Sold @ 117k
    1990 325i Zinnobar Red/Black Sold @ 115k

  7. #7
    Join Date
    Feb 2004
    Posts
    4,894

    Default

    It probably is the dreaded oil pump problems found on V8 engines... You should look into it.

  8. #8
    Join Date
    May 2004
    Location
    Windy City
    Posts
    606

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    M1 is still a good oil but not as good as what it used to be. After loosing to Castrol, they downgraded theirs too. I'm going to try RP next time...
    RICK
    BMW 1995 525i (Alpine White)

  9. #9
    Join Date
    Mar 2005
    Location
    WI
    Posts
    55

    Default

    Quote Originally Posted by dt8068
    I thought I'd try I thicker oil to quiet the engine down more (approaching 200,000 miles), so I think I'm gonna try Royal purple 20w50.
    I originally used M1 0w-40, now royal purple 10w-40. The RP is much quieter/smoother than the M1 was.

    My question is will RP 20w-50 be too thick for the m60? I also thought about using M1 15w-50 (the extended performance i think its called?) but apparently M1 isn't very good anymore and its not even a true synthetic now.

    anyone use rp 20w-50 in their 540? comments/suggestions?
    Try the castrol syntec 0W-30. Available at autozone only afaik.

    Sid

  10. #10
    Join Date
    Apr 2006
    Posts
    109

    Default

    What about Valvoline's 20w-50 and 5w-40 Group IV oils? Supposedly they were specifically designed to meet BMW's (and other manufacturers with similar requirements) specifications. I'm assuming for an M30 the 5w-40 would be preferable in a temperate climate?

    I'm talking about this stuff:
    http://www.valvoline.com/pages/produ...asp?product=19

    Apparently they sell it at NAPA and it's cheap compared to other Group IV oils like Redline. Looks like good stuff and I'm going to give it a try.
    Last edited by J.DeFeo; 08-09-2007 at 06:07 AM.

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