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Thread: Synthetic???

  1. #1
    Senior Member Woodi23's Avatar
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    Been reading on here about people saying running synthetic has caused a leek? Is this common? I run fulsyn ams oil... Share your thoughts.
    2010 TW - Easton bars & clamps, cyclerack (black), jimbo shield, acerbis steel gaurds, atv seat pad, custom skid plat, more upgrades soon

  2. #2
    Senior Member jontow's Avatar
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    This was explained long ago, and I'll reiterate what I remember, because I went through it, myself.



    Running full synthetic oil doesn't *cause* leaks, it exposes them. The oil will more readily dissolve gunk, grime, and sludge left behind by the conventionals. If you replace all of your gaskets (side covers, o-rings, etc), then replace your conventional oil with synthetic, there should be no leak. If there is, you have a messed up mating surface, or you damaged the gasket during installation, don't have the bolts torqued evenly / appropriately, etc.



    However, if you just change the oil from conventional -> synthetic on a 15 year old bike without doing anything else, you may find yourself leak-hunting. I did this on my 97, the first change I did when I bought the bike was to a full synthetic, and the leak chase started about 500 miles later. At this point, I've replaced all the old dried up gaskets and o-rings, and am not dealing with leaks, even though I continue to run the same synthetic oil.



    Enjoy, and don't be discouraged: its good oil, but you may pay a small price in gasket maintenance over time. You probably should do that, anyway
    --

    1997 TW, well loved, a bit modified.

  3. #3
    Senior Member frog13's Avatar
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    It all depends on the mileage of the bike,including how long you have been running conventional(dino) oil.In my non-schooled way of saying things.........After running dino oil for thousands and thousands and thousands of miles the gaskets will have degraded a bit.........then synthetic is introduced into the system.The operator will more than likely begin to see oil "weeps" or even leaks.The operator is either going to switch back to dino oil to cease the "leaks" or start the job of replacing the gaskets etc.Synthetic oil cleans the engine better internally,so there isn't "as much" crud build up over the miles and years......this is also a reason why the dino oiled engine began to see "weeps" or even leaks when the oil was switched to synthetic. The more educated than I may dispute this,but.............. .Synthetic has much better FLOW characteristics,it is not "more slick" than dino.

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  5. #4
    Senior Member Woodi23's Avatar
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    I got a 2010 and I bought the bike with 800 miles on it. I changed to fulsyn at 900 miles and I have no idea what kind of oil was in there before. So hopefully I will be good. I just get worried when I read about leaking motors.
    2010 TW - Easton bars & clamps, cyclerack (black), jimbo shield, acerbis steel gaurds, atv seat pad, custom skid plat, more upgrades soon

  6. #5
    Senior Member PalmStateCrawler's Avatar
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    Certain years are prone to base gasket leaks like '05. I have a '10 with about 4k miles on it with zero mechanical issues so far.
    '13 690 Enduro R too many frickin farkles...
    '07 KLX250 farkled (wife's bike)
    '86 BW80 farkled to size
    '10 TW200 you will be missed

  7. #6
    Senior Member old mad max's Avatar
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    The 2010's and newer should OK...The gasket is sooooooooooooooooooooo much better now. Syn oil will be fine for many miles.. On my 06 with 10,000 miles I switched to see if it would leak, yup It has started.. Not worried because I have new gasket just waiting to be put on...

    When I bought mt 09 triumph it came with syn and that's what they tell you to use. Mine now has 15,000 miles with "0" leaks. Yours should be just fine.... OMM.

  8. #7
    Senior Member small's's Avatar
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    I wouldnt worry about it. My 07 had a base gasket leak along with a friends 05 and 03. All of the bikes were leaking wen we bought them and none of the owner ran synthetic to my knowledge. After changing the base gasket ive been running synthetic every since with no problems. I think most of the synthetic causing leaks is a myth. It might expose an existing problem but shouldnt cause one.

  9. #8
    Senior Member Woodi23's Avatar
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    Thanks guys, this has calmed my nerves about running synthetic. I will keep on running it!
    2010 TW - Easton bars & clamps, cyclerack (black), jimbo shield, acerbis steel gaurds, atv seat pad, custom skid plat, more upgrades soon

  10. #9
    Senior Member Bucknutz's Avatar
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    Quote Originally Posted by frog13 View Post
    It all depends on the mileage of the bike,including how long you have been running conventional(dino) oil.In my non-schooled way of saying things.........After running dino oil for thousands and thousands and thousands of miles the gaskets will have degraded a bit.........then synthetic is introduced into the system.The operator will more than likely begin to see oil "weeps" or even leaks.The operator is either going to switch back to dino oil to cease the "leaks" or start the job of replacing the gaskets etc.Synthetic oil cleans the engine better internally,so there isn't "as much" crud build up over the miles and years......this is also a reason why the dino oiled engine began to see "weeps" or even leaks when the oil was switched to synthetic. The more educated than I may dispute this,but.............. .Synthetic has much better FLOW characteristics,it is not "more slick" than dino.




    I'm one of those guys that is experiencing an oil weep on the base gasket since changing to full synthetic on my 11000 mile 95. It unnerves me to see the weep, which turns into a few drips. I hope that switching back to dino oil will stop the leak. If not, I guess I'll be learning how to change the gaskets. Hope it is not too much of a job if I have to go that route. Dave

  11. #10
    Senior Member Dubster's Avatar
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    My 03 developed the base gasket leak after switching to synthetic.I have the gaskets on order and will replace them and continue to use the synthetic as the clutch and transmission work so much better.
    09 DL650 V-Strom "Function over Form at a Superior Price"
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    02 Tw200 " Camouflaged Redneck Edition" Sold to Son-in-Law
    73CT Trail90 "The most fun you can have under 100cc's" Sold. Had an offer I couldn't refuse.

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