Mixing engine oil
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Mixing engine oil

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    Senior Member larryfknrocks's Avatar
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    Default Mixing engine oil

    wanted to get some input on mixing engine oil. i recently had my motor freshened and the guy who did it only added 8 quarts to a 10 quart pan because he didn't know how many quarts it held. he said it was 20w50 in there now and since the cam and lifters were well enough to be reused there really isn't a break in necessary. i picked up some lucas oil 20w50 oil, you think this will be fine to add?

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    Senior Member EVILFORCE's Avatar
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    I would not worry about it.
    No Fool Like A Old Fool is there?

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    New here Beer:30's Avatar
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    Quote Originally Posted by larryfknrocks View Post
    wanted to get some input on mixing engine oil. i recently had my motor freshened and the guy who did it only added 8 quarts to a 10 quart pan because he didn't know how many quarts it held. he said it was 20w50 in there now and since the cam and lifters were well enough to be reused there really isn't a break in necessary. i picked up some lucas oil 20w50 oil, you think this will be fine to add?
    You have to ask yourself - were both oils tested and spec'd before they were bottled? Would either of those oils run the motor safely?

    Then if you poured a quart of one brand into a two quart container and poured another quart of the different brand in with it - would they separate and oppose each other?

    If they both do the same job - they will mix together just fine.

    Now, on the other hand - I don't know how much your "freshening up" of the motor cost, but if you really want peace of mind.....how much is an early oil change compared to the whole motor?

    You're fine with different brands and even different weights of oil mixed together. Even syn with conventional. All of them are made to work together. Still your decision.
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  6. #4
    Senior Member larryfknrocks's Avatar
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    thanks fellas.. i might just mix these two quarts for some quick run time

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