4-stroke running in

Discussion in '4-Stroke Engines' started by Irish John, Apr 10, 2008.

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  1. Irish John

    Irish John Guest

    Does the Honda GXH50 or the Chinese 4-stroke rip-off need running in. There is no mention in the manuals or instructions?

    Last edited by a moderator: Apr 15, 2008

  2. sparky

    sparky Active Member

    Oh yes, all engines need to be broken in.

    For 4-strokes, run regular dino oil in crankcase for about 7 hours before changing oil. Then run for 10~25 hours every other time before changing, switching to synthetic whenever you feel like it. To me, synthetic oil is more important to 4-strokes than 2-strokes.
  3. Irish John

    Irish John Guest

    What is dino oil? Brand names don't travel well unless it is Castrol or one of the worldwide brands. I would be changing the oil a lot because I do 10 hours a week easily. I don't want to be replacing silicone gaskets every week when I change the oil. Why do you recommend synthetic oil for the gearbox? Or are you meaning synthetic oil in the engine?
    I have no oil in my clutch but have greased the gears with lithium grease.
  4. Dino oil is short for Dinosaur oil or regular 10w-30 and 10w-40 motor oil whatever the brand it may be.

    I have a question on oil seeing I'll be getting that Titan in a couple of weeks I can't wait.
    Would Mobile One oil with that low viscosity be alright? Or would a straight blend 10w-30 or 10w-40 be better? Synthetic is great and all but I worry about it being thinner,you know?
    What about Synthetic blends?
    Last edited by a moderator: Apr 10, 2008
  5. Irish John

    Irish John Guest

    That's what the manual says except it recommends 10-30 oil. What I want to know is how often should I change the gearbox oil if I choose to have a wet gearbox. Changing the crankcase oil every 10-25 hrs is a pain because the engine is attached to the bike and wont tilt up enough to empty out the used oil. Any remedies for this? And the gearbox oil change interval as well?
  6. sparky

    sparky Active Member

    @Large -- Synthetic blend isn't worth it. Pick regular dino or full synthetic. Only tips I can give you on synthetic oil is that syn oils don't really become effective until they've heated up inside the engine... so the benefits of keeping the oil inside the crankcase 2 or 3 times longer than reg. dino is what you use synthetics for. Even tho you're keeping the synthetic in here for 3 times longer than regular oil, DO NOT forget to change your oil filter at regular intervals. (most of this i learned from cars, but it really shouldn't be different for other 4-strokes)

    @Irish John -- 10w-30 is common in most places... I'd only use something different if you use something different in the cars in your neck of the woods. If you use synthetic oils, you should change the oil every 30-70 hours instead... just topping off the oil when necessary, and don't forget to change the filter every 10-25hrs!!!

    Gearboxes are beyond me, but from what I know about regular automotive lubrication... gearbox oil needs to be changed about 1/5th as often (or so) as engines.
  7. BoltsMissing

    BoltsMissing Active Member

    Synthetics won't allow a new engine to wear in because it over-protects the new finished metals. ie, rings bedding into cylinder.
  8. Alan

    Alan Member

    I use them. On my larger machines 1600cc Kawi, and my Suzi M109R (VZR1800), that's all I ever use. Never went full synthetic. I ran Amsoil full syn in my Meanstreak, but after 4 years, went back to the blend.
    Never understood the logic of spending twice as much on the oil, then keeping it in your crackcase so long. Yes, it will hold up, but think of all that filth in there. I mean, while it's synthetic, and can last longer, do you really want that ? How is that good ?
    Amsoil at 3000 miles is dirty. I would never leave it in there an additional 4500 miles like they say you can.
  9. Irish John

    Irish John Guest

    How may miles should you run is a 4-stroke Honda or chinese copy? What max speed during run in? every 10 hours is about every 250kms I've worked out and that is a very short time. Too much trouble. There must be a better oil that last longer.
    How do you get the oil out of the engine without turning the bike upside down?
  10. azbill

    azbill Active Member

    I have read of using a piece of fuel line attached to a kitchen baster to change the oil
  11. sparky

    sparky Active Member

    It's true.. there's no benefit to using synthetic if you don't let it break down naturally & continue to use it longer, since that's the whole purpose behind synthetics -- better protection & longer use, which leads to no money lost . But of course, you're supposed to change your oil filter at the same interval you would with regular oil. For example, in my car, I change the filter every 3 to 4 thousand miles & top off the oil. I only completely drain the oil every other filter change.

    My '94 Corolla runs great with 240,000 miles on it. Have been doing this synthetic process since i got it with 150,000 on it, and the engine sounds just as good as the day I bought it. I also don't have a hood on her, just water gasket sealant around the plug wires & distributor cap. But I don't suggest you do this if you care about your ride... I'm purposely trying to see how much damage this car can take. I also rarely drive below 90-100mph on the interstate, but of course this is for testing the synthetic.

    Anyway, I still have a 2-stroke on my bike, so all of this is under the assumption that the GXH50 has an oil filter obviously.

    In summary... Yes, it is a waste to buy synthetic & completely drain at regular intervals... it's a lose-lose situation. And sure you can use blend, but what's the purpose? I highly doubt a corporation would give you the amount of synthetic you think you're getting. You know the saying... You get what you pay for!
  12. sparky

    sparky Active Member

    Also... this link I found is pretty interesting if you don't ever want to change the oil in your engines: http://www.synlube.com/oil.htm

    I still think it's crazy some people would only change their filter once in 50,000 miles... but ya never know.
  13. Herrmanator8

    Herrmanator8 Guest

    im not sure if my gxh50 engine has an oil filter...it never told me in the manual about one, i would assume its just a simple crankcase like the rest of them but is there one? im also wondering if i should use synthetic oil for break in, since i plan on babying my bike and only feeding it the best i plan on changing the oil every week or so with Maxima530MX 100% ester-based synthetic 4-cycle oil, i think it'd b real good for my engine and i would rather spend $10 per quart than $5 on a bottle of NAPA oil...what should i do? i want my engine to run the best for thousands of miles with good power. and im also wondering... what kind of oil should i use in the crankcase?


  14. sparky

    sparky Active Member

    If it's not in the manual... there prolly isn't one. I just assumed there was a filter, because that's how larger 4-strokes are designed.

    Most of your other questions are already answered in this thread. Use conventional oil for break-in of 7hrs. After that, switch to synthetic & you should be able to go a bit longer than a week before you need to change the oil. I'd say 30hrs of runtime (give or take 10hrs) with synthetic is what you need watch more than how long it's been since your last oil change (unless, of course, it's been months). Specific brands are nothing but personal choices. You are more than welcome to research that for yourself and tell us what you chose.
  15. thatsdax

    thatsdax Guest

    I have been told that..

    I have been told that if you use Synthetic oil in a new engine, that the engine will not wear or "break in". I was told that you need to use a Dino oil for break in. Switch to a Synthetic after break in. As for oil filters, there are none for the smaller 4 strokes. Not really needed. There is not much oil to filter for these small 4 strokes. On my Titan 4 stroke, I am running it and abusing it. I want to see how much abuse it can take. Worst case kind of thing. It is my test engine. so..I want to see what it can take. So.. I have not changed my oil yet. IT has a lot of miles on it with the break in oil Val 10-30 conventional. I am running 2 Titans currently. This particular one has around 750 miles on it with the original 10-30 motor oil in it. It is just now turning a darker color. But still looks good. I Think I will run it another 500 miles or so and then change it .. Maybe. I am trying to Abuse the motor to see what it can take. It bothers me to treat it so badly.. But.. Some people will treat them bad.. So.. I need to know if they can take it. And..So far.. IT can take it.. Has not missed a beat. At any rate. That has been my take. Dino Oil for Break in. Syn after break in. As a rule of thumb, do not go over 20mph for the first 300 miles or so. Enjoy the ride..:grin:
  16. sparky

    sparky Active Member

    That's the problem with numbers & statistics... everybody's got their own.

    There are certain concepts that are pretty much set in stone: use dino for break in, use synthetic afterwards, don't go full throttle for X amount of miles, etc.

    How long you break it in, how long you go without changing your oil... well, that's all up to you. I feel as if an engine isn't broken in within 150 to 200 miles... you got screwed. Dax might be trying to cover his arse, but... the answers to duration all lie within you & your research. If you're not researching, then it's obvious you don't care about your engine.
  17. HoughMade

    HoughMade Guest

    The GXH50 does not have an oil filter. It is splash lubricated and therefore has no oil pump. It is difficult, if not impossible to have an oil filter in a system that is not pressurized because there is no mechanism for forcing the oil through the filter.

    Earlier, someone said something about turning the engine upside down to change oil. The GXH50 does not have to be turned upside down to drain the oil. It has a drain plug.

    I have heard that the concerns about synthetic are overblown and that an engine will break in on synthetic- several new higher end cars come new with synthetic. That being said, regular oil changes negates most of the benefits of synthetic.
  18. eltatertoto

    eltatertoto Guest

    okokok, lol when my engine comes in the mail, to i just put oil i9n the ENGINE and go? or do i gotta put it somplace else also??? pics of plugs would be awesome. ive only worked on b&s and tecumpseh. no hondas. thanks!.
  19. HoughMade

    HoughMade Guest

    Just in the crankcase.

    Attached Files:

  20. SirJakesus

    SirJakesus Guest

    You can also buy oil/gas siphon pumps from automotive stores and even the wallyworld auto section real cheap if your engine doesn't have an accessible drain plug.