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  1. 07-30-2008 01:23 PM #1
    PRVWing
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    oil grade for summer

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    I'm doing an oil change during this weekend, I'm going to be changing to Royal Puple just to try it; I'm even going to dyno it to see if theres any hp/tq gains. The thing is, I live in Puerto Rico, and here the temperature is always around 85 degrees, and on summer its around 90 during the day. If I cant find any 0W40 Royal Purple, what other grade could I use? 5W40?

    Thanks,
    John
    FlexTuning

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  2. 07-30-2008 01:44 PM #2
    dougyfresh
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    Re: oil grade for summer

    You should be concerned with the higher number. (40) That is the viscosity of this multi-grade oil at 100°C (212°F) operating temperature.

    The 0W or 5W refers to what has historically been designated as "Winter". How well will the oil circulate in cold temperatures. A 0W oil is tested at -35°C, a 5W at -30°C and a 10W is tested at -25°C.

    Multi grade oils like 5W40 designate how they flow (viscosity) in cold (5) versus warm (40). A specific oil will have high viscosity when cold and a low viscosity at the engine's operating temperature.


    5W40 should be fine for you down in PR. I'm running 5W30 year-round and I'm up in the NorthEast.
    -Doug
    2002 A4 Avant EPL tuned 2.7T K04 6spd
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  3. 07-30-2008 08:01 PM #3
    PRVWing
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    Re: oil grade for summer

    cool! thanks a lot!!!
    FlexTuning

    White USP A4 1.8TQ6MT
    K04, 380cc injectors, GIAC Reflash, HKS BOV, PSi TP, Milltek exhaust (with Magnaflow mufflers), AWE FMIC, Samco TIP, Neuspeed snub-mount, Neuspeed Power Pulley, Stratmosphere short shifter, Stratmosphere clutch, B6 S4 front and rear brakes, stainless steel brake lines, RS4 19'' reps, RS4 rear sway-bar. NEW Bilstein Sport Shocks, and H&R Sport springs!
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  4. 07-30-2008 09:30 PM #4
    VAG_4ever
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    Re: oil grade for summer

    0w30- mobil one..
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  5. 07-30-2008 09:36 PM #5
    Elliott
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    Re: oil grade for summer

    Quote Originally Posted by A4_ever View Post
    0w30- mobil one..
    Same here.
    CEO and General Manager of the AZ Pedal Responce Team
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