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  • 10w30 or 10w40 or ?

    my engine is now pushing 137,000 miles and I am pretty hard on my car. should I stay with the castrol 10w30 like my car says or should I put some thicker oil in because it has so many miles on it? it wont hurt anything putting 10w40 in it will it?
    96 Camaro 3.8 A4 Basemodel: 8 mm wires, Shift Kit, Hollowed <br />Cat(o2 sims), RKSport exhaust, IAT 5.6K resistor, Home Depot CAI<br />&gt;&gt;&gt;15.375 @ 89.27&lt;&lt;&lt;NEW BEST TIME <a href=\"http://www.cardomain.com/memberpage/552491\" target=\"_blank\">http://www.cardomain.com/memberpage/552491</a>

  • #2
    If you've been using 10w30 since the beginning of time with the car then keep on using. Don't need to switch it won't do you any good.

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    • #3
      the only time you switch oil is when you will be making more heat or less heat

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      • #4
        187k here, i've been using 10w30 since i bought the car.
        1996 Hunter Green Chevrolet Camaro A4 Y87 - 3.8 Series II V6 (200k and still going strong)<br />Flowmaster 80 Series Muffler, SLP Cold Air Intake

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