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Engine oil type for merc 7.4?

Mercury MerCruiser

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Old 05-31-2015, 03:01 PM   #1
 
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Default Engine oil type for merc 7.4?

What is the proper grade engine oil for a '96 merc 7.4. Have heard different recommendations like 30w, 40w, and even rotella diesel truck oil.


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1996 Mariah Talari Z240 7.4 Merc Bravo III

As long as you have a few nuts, bolts and screws left over after the job is done, it should work!
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  • Old 06-01-2015, 03:52 AM   #2
     
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    Default Re: Engine oil type for merc 7.4?

    Oil & Gear lube capacities & Std wiring colours

    Oil & Gear lube capacities & Std wiring colours

    15/40 is the recommended weight. Brand? I use Mobil 1 but that's just my preference.
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    Old 06-01-2015, 02:32 PM   #3
     
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    Default Re: Engine oil type for merc 7.4?

    Thanks moto. Called the dealer and they recommended sae40 so i went with that


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    1996 Mariah Talari Z240 7.4 Merc Bravo III

    As long as you have a few nuts, bolts and screws left over after the job is done, it should work!
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    Old 06-10-2015, 06:55 PM   #4
     
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    Default Re: Engine oil type for merc 7.4?

    I use 10-40 Royal Purple synthetic in my 7.4
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    Old 09-29-2015, 09:08 PM   #5
     
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    Default Re: Engine oil type for merc 7.4?

    My 1996 5.7 Merc requires Quick Silver 20-50 by manufacturer so I expect yours would be the same?

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