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  1. #1
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    New SHO 250 What oil to use.

    What is the best oil by Yamaha to use in this. When do you change during breakin and how many hours to you change when in normal operation.

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    #2
    Mine came with the standard 4m yamaha oil, 5w30. I changed the oil at the 20 hour mark due to having a rising oil level, see other post. Anyway, the manual recommends every 100 hours or once a year, I believe. I have about 85 hour and just had the Yamaha synthetic oil put in. If i'm off a little i'm sure someone will speak up.
    Britt
    Piedmont, SC

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    #3
    Here ya go...

    http://www.yamaha-motor.com/assets/s...rrent_1803.pdf


    I used the all syn from minute one and like it!

    Yamalube 4S 5W-30 Outboard Oil
    Last edited by falcooon; 06-13-2012 at 05:59 PM.

  5. Member berger1b's Avatar
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    #4
    Mine has had the syn put in it from the beginning. I plan to stay with it from here on.
    Bernard
    2012 Pheonix 921 - Yamaha 250 SHO

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    #5
    What's better about it other than the higher price?

  7. Member Meleagris1's Avatar
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    #6
    Can of worms there, but generally most feel that it does a better job lubricating and doesn't break down as fast. I have had good results with full synthetic in my SHO.

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    2010 Skeeter 20i - Yamaha 250 SHO

  8. Member berger1b's Avatar
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    #7
    Here is a pretty good article from Boat trader about the difference between synthetic and conventional oil. I pan to keep my boat a long time so I will stay with synthetic unless they come up with something better. But in the end you have to decide which is best for you.
    Marine Engine Oil: Synthetic or Conventional? | Boat Trader - WaterBlogged
    Bernard
    2012 Pheonix 921 - Yamaha 250 SHO

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    #8
    According to the Yamaha tech who fixed my SHO the synthetic has additives that stays in the motor longer to prevent dry start ups after the motor sits up for weeks at a time.

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    #9
    I have to agree with that.
    Quote Originally Posted by wthom12 View Post
    According to the Yamaha tech who fixed my SHO the synthetic has additives that stays in the motor longer to prevent dry start ups after the motor sits up for weeks at a time.

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    #10
    All I look for in the statement I made is show me the proof that its better. I used to be a believer but when two engines make it to 700 to 800 hours both working as they should one on synthetic one on mineral oil who is to say one is better? The question what's the best oil for my SHO that Yamaha makes there is no clear answer.
    Last edited by hooken203; 06-15-2012 at 05:25 AM.

  12. Member Meleagris1's Avatar
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    #11
    Take those engines apart and see how they look on the inside, inspect for wear, deposits etc. It always amazes me how well engines can run even with bad things going on inside. Not saying your engines have anything like this, but you may need to inspect the internals to satisfy yourself and find your proof. Just like two guys who live to 93, one on a healthy diet and one on fast food. May look very similar on the outside but their insides will tell a different story.

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    2010 Skeeter 20i - Yamaha 250 SHO

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    #12
    Here is my reason for why I am a skeptic. I have and old beater now but its a 1991 Chevrorlet K1500 5.7 engine. When I bought it it had 20k on it. I started using mobil 1 at that point at 190k of mostly towing my boat it has a knock that has been coming for a while but the oil pressure started getting low. Long story short mian bearings were worn out. It motor time. I worked in an auto repair shop at the time and saw day in and day out trucks that we serviced from new using mineral oil making it to and past that 190k mark. So I ask the question how was I better off using synthetic oil. And your healthy diet analogy well I am sorry works out about the same for me if we both make it to 93 who cares what we ate to get there. My point is you as a consumer are never going to see if it makes a difference because you have nothing to compare it to and most poeple never keep it long enough to really wear it out. So back to mans question Falcoon probably has the right answer for the most part just run what the manuals says and you will be ok either way. Man this constant battle about which is the best motor oil is fun.

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    #13
    Regardless of which oil you feel is better my advice is to change the oil and filter more frequently and it will prolong the life of the engine .

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    #14
    Bingo

  16. Member Meleagris1's Avatar
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    #15
    I put about 35 hours on my outboard each season and it's a 2 hour trip to my mechanic. I have one oil change done at the end of each season, so that is another reason why I run the synthetic(besides the fact Yamaha recommends it). However, this is America and I fully support the right of others to use the cheapest oil they can find . . . and eat lots of fast food.



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    #16
    Well that you tube clip changed my mind. Off too Mac Donalds. C-ya

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    #17
    Well, my suggestion is to run the regular oil until you know that the rings are seated and you are not getting any more blow by fuel i.e. making oil. Due to the synthetic being much more expensive. I highly doubt that the fuel efficiency savings is that big of deal, when you factor in the cost of the synthetic. i have run both oils in my current engine, and I honestly can't see a difference in engine performance. As far as what the engine looks like on the inside, I could care less, because the SHO is a disposable engine due to plasma coating cylinders etc... Plus I don't plan on keeping it long enough for it to wear out.
    With all that said, I would rather run the regular oil, and use the saved money on other things.

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    #18
    I ran the standard 4m for the first 125 hours to make sure everything was good and seated. Then I switched to the 4m synthetic. I did so at the recommendation of Yamaha outboard technical support/Atlanta.
    2011 Phoenix 719 & 225 SHO, thank you Berkeley Outdoors!