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Thread: Mobil 1 0w-30?

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  1. #1
    I guess its good if you like putting water in your motor. I use 20-50.

  2. #2
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    Quote Originally Posted by 6.0vortecchevy View Post
    I guess its good if you like putting water in your motor. I use 20-50.
    Not good for tight tollerences of LS based motors.

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  3. #3
    I dont know if i agree with that since race motor are built to the tightest terrence running 20-50. And looking at a spec sheet i wouldn't say there really tight.

  4. #4
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    the numbers have to do with heat tolerances. my motor rarely if ever sees 200*, so 0-30 is more then enough. If you were running a turbo/nitrous/etc and saw temps above 220* on a regular basis, i'd run heavier oil. On a n/a motor, there is no reason to run thicker oil...you're just hurting things when it's cold from lack of lubrication.
    blown transmissions are about as useful as 97% of the guys on this forum

  5. #5
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    A little birdy once told me all synthetics are the same weight. Said it was a marketing deal to cover most applications. I wouldn't get 20-50 no where near a stock bottom end ls motor. Bearing clearances are way to tight for that thick of a oil. GM doesn't suggest light weight oil for nothing.

    I run 15-40 with 0.003 clearances, those are double what stock is. And its still a little thick for that....

  6. #6
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    no thanks ill stick to mobil1 5-30 and the famous royal purple 5-30 haha

  7. #7
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    So what I'm gathering is, I should play it safe, return it and get 5w-30.
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  8. #8
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    Quote Originally Posted by 6.0vortecchevy View Post
    I dont know if i agree with that since race motor are built to the tightest terrence running 20-50. And looking at a spec sheet i wouldn't say there really tight.
    Race motors arent usually tighter than a stock motor. If anything, they run more clearance and use heavier oils. Not trying to start an argument, just sayin

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    Ah i miss the good old days of rotella now its got so much detergents in it im afraid to run it in my diesel, so thats why i run amsoil nothing is better period
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