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Thread: conventional oil from synthetic

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  1. #1
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    conventional oil from synthetic

    Is it bad to use conventional BMW oil after the bike has already been using synthetic. What are the ramifications if I already did this?

  2. #2
    Cam Killer marchyman's Avatar
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    None. Read the labels of your oil bottles some time. You can mix and match synth, semi synth, dead dino juice, all with out issue. In effect what you have done is the same as using a semi-synth --- a blend of natural and synthetic oil.

    Edit: I misread your post as asking if it was OK to mix, not change oils. Yeah, mix or change is OK.
    Last edited by marchyman; 07-10-2013 at 12:02 AM.

  3. #3
    Lost again Texpaul's Avatar
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    synthetic to conventional

    I've done it on two bikes with no problem. Since I have to do 10 to 15 oil changes a year ( 3 bikes) I saved some money going back to conventional oil.
    Paul Mulhern
    MOA# 56330
    '05 1200GS Big Blue

  4. #4
    2011 R1200RT ka5ysy's Avatar
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    Engines do not care what kind of oil is being used. Synthetic works better in high temp operations, but as long as you watch the API Service grade required, you will not have problems. You can even mix synthetic and dinosaur oils if necessary. Do not stress over this.
    Doug, 2011 R1200RT Polar Metallic
    MSF #127350 NAUI #36288

  5. #5
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    Quote Originally Posted by ka5ysy View Post
    Synthetic works better in high temp operations
    Yeah, I have heard this, so I usually go buy the Mobil1 15000 mile stuff at $8 to $10 a quart for my oilhead.
    Then I feel like an idiot when I change it at 3000-4000 mile intervals.

  6. #6
    2011 R1200RT ka5ysy's Avatar
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    Quote Originally Posted by scott.lambert View Post
    Yeah, I have heard this, so I usually go buy the Mobil1 15000 mile stuff at $8 to $10 a quart for my oilhead.
    Then I feel like an idiot when I change it at 3000-4000 mile intervals.
    If you want to scientifically determine when you can safely change oil, give Blackstone Labs a try:

    http://www.blackstone-labs.com/motorcycle.php
    Doug, 2011 R1200RT Polar Metallic
    MSF #127350 NAUI #36288

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