Engine Oil

mfritzmfritz Member Posts: 41 ✭
in General Boating Discussions
I have 350 Max MPI engines in my 2008 350 Rinker. It is recommended to use synthetic 24W-40 oil. What brand does everyone use?
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  • TonyG13TonyG13 Member Posts: 1,438 ✭✭✭✭
    edited October 2020
    I use Quicksilver 25W40. Just got some from Amazon. Plan do to the change next week...

    https://www.amazon.com/dp/B00C508YTM/ref=cm_sw_r_tw_dp_x_MBHGFb3N9D7G9 
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  • PickleRickPickleRick Member Posts: 4,333 ✭✭✭✭✭
    With my high hour 5.7 I used 15w40 rotella.  I use it in everything besides my VW tdi
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  • kordokordo Member Posts: 247 ✭✭
    I was under the impression that 15w40 rotella was for diesel engines.  Can it also be used for gas engines?  
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  • 69fastback69fastback Member Posts: 951 ✭✭✭
    kordo said:
    I was under the impression that 15w40 rotella was for diesel engines.  Can it also be used for gas engines?  
    Yes
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  • Liberty44140Liberty44140 Member Posts: 4,414 ✭✭✭✭✭
    Walmart stocks quicksilver 25w40 for $25 a gallon. No brainer to go buy that 
    07' Cruisers 390 (Previous Rinker's: 06' 342EC & 01' 310FV)

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  • PickleRickPickleRick Member Posts: 4,333 ✭✭✭✭✭
    kordo said:
    I was under the impression that 15w40 rotella was for diesel engines.  Can it also be used for gas engines?  
    I've used it in diesels, v8s and motorcycles for decades.  
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  • Black_DiamondBlack_Diamond Member Posts: 5,439 ✭✭✭✭✭
    The Rotella has high zddp (anti-wear) additive. Great stuff..bad for catalytic converters. lol. I run the Rotella T6 15W-40 in my 350 MAG’s. 

    Past owner of a 2003 342FV
    PC BYC, Holland, MI
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  • Aqua_AuraAqua_Aura Member Posts: 2,702 ✭✭✭✭✭
    I run Rotella in my 7.3 and I've had the oil analyzed a few times and even after 7000 miles the oil still has plenty of life in it. I had one go to around 12000 before I changed it and the analysis thought I had given them the wrong mileage but it was 12k
    1997 Bayliner 3988
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  • TonyG13TonyG13 Member Posts: 1,438 ✭✭✭✭
    @mfritz was nice enough to sent me a DM regarding the Quicksilver 25W40 - and noted that the label says "4 Stroke Engine Oil."

    I reassured him that it is indeed the correct oil for our sterndrives -- as the smaller font down the label does confirm -- "for use in sterndrive and inboard engines."  And most of us have been using this stuff for years.

    Anyone know why they label is that way? Are 4 strokes a bigger market? Or why not have a big label that says: "4 Stroke, Sterndrive, & Inboard Oil?"

    Just wonderin'
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  • aero3113aero3113 Member Posts: 9,763 ✭✭✭✭✭
    edited October 2020
    Sterndrives or inboard doesn’t matter, the engine is a four stroke.
    2008 330EC
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  • TonyG13TonyG13 Member Posts: 1,438 ✭✭✭✭
    Just learned something. Thank you @aero3113 (as you can now tell I know nothing about 4 strokes)  :)
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  • Aqua_AuraAqua_Aura Member Posts: 2,702 ✭✭✭✭✭
    edited October 2020
    The 4 Strokes

    Suck
    Squeeze
    Bang
    Blow

    This is not an adult humour joke. That is literally how it was explained to me when I went to school 🤣.


    This is a good YouTube channel if you want to learn some mechanical type stuff. 

    https://www.youtube.com/user/EngineeringExplained
    1997 Bayliner 3988
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  • PickleRickPickleRick Member Posts: 4,333 ✭✭✭✭✭
    To further complicate things please explaine the old 2 stroke diesel engines!


    I think Mercury uses the 4 stroke and 2 stroke labels so the consumer wont mix the two up.

    A 2 strokes eats and pukes at the same time.  
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  • Aqua_AuraAqua_Aura Member Posts: 2,702 ✭✭✭✭✭
    Those 2 stroke detroit diesels are really cool. I think I saw how they work at some point but forgot. 

    Good point on the labeling of 2 and 4 stroke otherwise people probably would mix them up. 
    1997 Bayliner 3988
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  • PickleRickPickleRick Member Posts: 4,333 ✭✭✭✭✭
    edited October 2020
    Ive got a dual fuel kubota engine sitting at the shop right now.  Shares the same block as the 3 cylinder diesel only she's built to run propane or gasoline.  


    Engines used to be simple
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  • YYZRCYYZRC Member Posts: 5,406 ✭✭✭✭✭
    Aqua_Aura said:
    The 4 Strokes

    Suck
    Squeeze
    Bang
    Blow

    This is not an adult humour joke. That is literally how it was explained to me when I went to school 🤣.


    This is a good YouTube channel if you want to learn some mechanical type stuff. 

    https://www.youtube.com/user/EngineeringExplained
    That brings me back to high school shop class!
    Also ICPE: Intake, Compression, Power, Exhaust
    2006 390 EC
    2008 350 EC
    Georgian Bay
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  • IanIan Member Posts: 3,059 ✭✭✭✭✭
    I’ll remember @Aqua_Aura’s first...

    Regards,

    Ian

    The Third “B”

    Ravena Coeymans Yacht Club

    https://www.rcyachtclub.com/

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  • mfritzmfritz Member Posts: 41 ✭
    Thanks for all your comments!!!
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  • McGarnicleMcGarnicle Member Posts: 260 ✭✭✭
    I’ve been running Amsoil in both my motors and drives 
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  • RiverRat232RiverRat232 Member Posts: 596 ✭✭✭
    Another vote for Rotella. I use it in my diesel tractor, gas tractor, motorcycles and boat. The cars and truck get Mobil 1. 
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