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What oil for summer?

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    What oil for summer?

    What is the best oil to use during the summer? What would u recommend for my 113,000 mile eta? Thanks.

    #2
    Well 10W40 is a good year round oil in my area, but I've used 20W50 in the summer months too. I'd recommend 10W40 for you, but that's just me.

    Something like Mobil Clean High Mileage or Castrol GTX High Mileage
    Last edited by lordofthewaters; 06-14-2006, 09:26 PM.

    Sarcasm is a body's natural defense against stupid.
    When a man talks dirty to a woman, it's sexual harassment. When a woman talks dirty to a man, it's £3.95 per minute.
    "My mother never saw the irony in calling me a son-of-a-bitch." Jack Nicholson"
    Old age and treachery will always overcome youth and skill.



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      #3
      I'm not sure what Michigan summers are like, but here in SoCal, I use Mobil 1 15w50. I used to use Castrol GTX 20w50 when I still filled with dino oil.

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        #4
        Ok according to my Bentley manual ( I just remembered there's a chart in there).

        Viscosity requirement vs. temperature
        5w20
        -40F to 20F degrees

        5w30
        -40F to 25F

        10w30
        -20F to 40F

        10w40
        -20F to 50F

        10w50
        -20F to 70F

        15w40
        0F to 90F

        15w50
        0F to 105F

        20w50
        20F to 120F

        SAE20
        -20C to 10C Degrees

        SAE 30
        0C to 30C

        SAE40
        20C to 50C
        Last edited by lordofthewaters; 06-14-2006, 09:28 PM.

        Sarcasm is a body's natural defense against stupid.
        When a man talks dirty to a woman, it's sexual harassment. When a woman talks dirty to a man, it's £3.95 per minute.
        "My mother never saw the irony in calling me a son-of-a-bitch." Jack Nicholson"
        Old age and treachery will always overcome youth and skill.



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          #5
          anyone else find it a little odd that the oil temp range is rated for the external temperature, when the oil takes heat from the engine, and pretty much conforms to whatever temperature the thermostat is set to kick in at?
          : : 1984 318i : : PNW E30 Crew : : Sold!!
          Now becoming the R3vlimited Pro3 car
          http://www.r3vlimited.com/board/showthread.php?t=93780

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            #6
            Originally posted by chuckybob
            anyone else find it a little odd that the oil temp range is rated for the external temperature, when the oil takes heat from the engine, and pretty much conforms to whatever temperature the thermostat is set to kick in at?
            That's why the first number is really more important when taking outside temp into account. The first number should be appropriate to the temp you are operating in.

            For example her in Canada I use 5W-50 in the winter to help with cold starts and I use 15W-50 the rest of the year. I use 15W-50 to top it off during the winter months due to the breakdown of the oil over time. The 50 is the same in both cases because I want the maximum viscosity at operating temperature.

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              #7
              I run 15w50 year round. :D
              - Sean Hayes

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