Oil Recommendations
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Oil Recommendations

  1. #1
    Senior Member GAWnCA's Avatar
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    Default Oil Recommendations

    Well, I've got my motor back in the boat. Set the timing and ran in the cam. All this was done with 20w50 Valvoline oil. Now I am wondering, is this heavy weight oil really necessary on a pleasure jet boat? I'm not going to be out racing WOT. Yes, I might jump on it once in a while for very short spurts but, wouldn't something like 10w40 or even 10w30 work just fine? This is a 460 BBF that's .30 over and nothing more than a mid-grade gas motor.

    Thanks,
    Greg

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    Senior Member GAWnCA's Avatar
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    Did this question stump the pros?

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    Senior Member H20MOFO's Avatar
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    No pro here, but I think there has been so many oil threads everyone is burnt out. I heard, and have never been able confirm or deny, that in order to know the weight of oil you need to know it's operating temp, the higher the temp the thicker the wt.??
    Another Hot Boat refugee

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    Senior Member GAWnCA's Avatar
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    Quote Originally Posted by H20MOFO View Post
    No pro here, but I think there has been so many oil threads everyone is burnt out. I heard, and have never been able confirm or deny, that in order to know the weight of oil you need to know it's operating temp, the higher the temp the thicker the wt.??
    I did a search and couldn't find anything so I thought I would ask the question again. I know most questions have been asked more than once and then lost. I think I'm go to try 10w30 and see how that goes. This is a new build and no thermostat. I'll let you know how it goes. At least you replied! Thanks.

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    Senior Member W.O.T's Avatar
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    I run 20-50 or valvoline racing 40wt

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    Senior Member Gravyboat's Avatar
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    15-40WT should be good. Depending on temps., a new, tight motor shouldn't need 20-50 IMO.

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    i use rotella 10-50 owith my bbf ford,and its also .30 over. been told it has lots of zink.

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    Mighty Member BoobyBouncer's Avatar
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    i run the same 15/40 rotella in our diesel rigs, my pops pro street car, personal vehicles and my boats.. never had any issues with any of them.. but i do change the oil in my boat at least every 2 to 3 river trips

  11. #9
    Senior Member Gravyboat's Avatar
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    You might a little info here:

    http://www.performanceboats.com//showthread.php?t=6508

    Also check out 460ford.com

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    Senior Member GAWnCA's Avatar
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    Quote Originally Posted by Gravyboat View Post
    You might a little info here:

    http://www.performanceboats.com//showthread.php?t=6508

    Also check out 460ford.com
    I'll check that link and I've tried signing up on 460ford.com about a dozen times with no luck. Thanks

  13. #11
    Senior Member GAWnCA's Avatar
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    Quote Originally Posted by jetboat View Post
    i use rotella 10-50 owith my bbf ford,and its also .30 over. been told it has lots of zink.
    I know this Valvoline 20w50 seems like I may as well be running straight STP. Damn this stuff is thick.

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    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Well for the first 25 years of my boat's 30 years floating, she ran 10w-40 (and the old 454 spent a decent ammount of time WFO outrunning bass-whackers and other jets too).

    I suspect most people (including me these days) run heavier oil than they absolutely need to (especially the guys running straight 50wt).
    My personal sin is Castrol Syntech 20w-50 synthetic.
    "As democracy is perfected, the office of president represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be adorned by a downright moron."
    H.L. Mencken

    OBAMA: Some people deserve this.
    The rest of us are being dragged along kicking and screaming.

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    Senior Member GAWnCA's Avatar
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    Quote Originally Posted by SmokinLowriderSS View Post
    Well for the first 25 years of my boat's 30 years floating, she ran 10w-40 (and the old 454 spent a decent ammount of time WFO outrunning bass-whackers and other jets too).

    I suspect most people (including me these days) run heavier oil than they absolutely need to (especially the guys running straight 50wt).
    My personal sin is Castrol Syntech 20w-50 synthetic.
    I know one thing, this 20w50 is almost the same thing as running straight STP. So I'm going to try some 10w30 synthetic and see how that works out. My oil is at 80 psi with the 20-50.

  16. #14
    Cas
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    I've been running a 15-40 synthetic blend for a few years now. Before switching, I used the Valvoline 20-50 and the engine would always lose at least 15lbs of oil pressure after a wot run. With the synthetic blend, the oil pressure stays fairly constant before during and after wot runs.
    Being your engine is still new, I don't think you want to run a synthetic just yet?

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