Yamalube 2M 2 cycle oil

ROBERTH

ROBERTH

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Has anyone had experience with the oil deteriorating? Not sure what to call it really. Just noticed as I was pouring it into the oil tank, there were some lumps in it. I stopped and got a funnel with a screen filter. It clogged up immediately. Upon more investigation, the oil has a lot of what looks like crystals or seperation and oil lumping like maybe sludge.
This oil was purchased in Jan. 24 and I store in the garage.
I have never had this issue before when I used to use Pennsoil synthetic and semi synthetic, then switched to Amsoil, no issues, then went to Yamalube due it claimed lower ash content therefore less carbon on the O2 sensors which is the issue with the HPDI's.

So, I will be switching back to the Amsoil now that this has occurred. Losing 2 cases of the Yamalube as result of this issue!
 
No, I haven't see that before. Odd.

But when you say "lower ash"... was that in comparison to Penn Synthetic... or just a general comment? Reason being, I have found that Penn smokes noticeably less than Yama. Evinrude XD100... even less.
 
Unable to return as I got it online from Domo.
I used the pennzoil for a few years and had a lot of carbon fouling the O2 sensor. Less with the Amsoil, but it was not as good as the yamalube regarding the carbon issue. I will just know to service the 02 sensor every season, approx 100 hrs. I just don’t trust the yamalube anymore.
 
Check the other containers. I would call Domo and Yamaha customer service.

Is this coming out of the Yamaha bottle or in your oil tank?


AI Overview

Yamalube oil showing crystals, separation, or sludge is often carbonized, unburned oil and fuel mixture from the exhaust, especially after long storage or idling, and is not necessarily a problem with the oil itself. However, if you find milky or sludgy oil by draining the gearbox, this indicates water contamination, which requires a lower unit inspection and repair for a faulty seal. Check your engine's fuel/oil mixture and consider running the engine at higher speeds to burn off the accumulated exhaust sludge.

Sludge in the Exhaust (Normal)

  • Cause:
    This black, oily sludge is a mixture of oil and carbon that builds up in the exhaust system and can get washed out. It's common if the engine has been idling for extended periods or has a faulty oil pump.
    • Run the engine: Hard running or a good period of operation at higher speeds can help burn off the accumulated carbon and oil.
    • Check your mixture: Ensure you are using the correct fuel/oil ratio (e.g., 50:1) and not running the engine "rich".
    • Inspect for leaks: If the sludge seems to be coming from the lower unit instead, it could indicate a leak in the seal, according to Louisiana Sportsman.
Milky or Separated Gearbox Oil (Problem)
  • Cause:
    If you see milky-looking oil after draining the lower unit, this means oil and water have mixed due to condensation or a leak.
    • Check for leaks: The lower unit seal is likely the culprit, so inspect it for any damage or corrosion.

    • Flush and refill: You may need to flush the lower unit to remove water and then refill it with the proper gear oil.
Other Potential Issues
  • Water in fuel:
    .
    Old or contaminated fuel can cause the oil mixture to separate, leading to issues.

  • Faulty oil pump:
    .
    If the engine's oil pump is stuck open or misadjusted, it can result in too much oil being mixed with the fuel, causing excess exhaust residue.

  • Crankcase seal leak:
    .
    A leaky crank seal could be allowing gearbox oil to be sucked into the crankcase.

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This is all new out of the bottle as I am refilling the remote tanks. I usually have to add 1 gallon to each tank after each offshore trip.
 
AI seems to think the oil can go bad!

AI Overview

Crystals or sludge in a fresh container of Yamalube 2-stroke oil usually indicates the oil has gone bad due to contamination, moisture, or age, and it should not be used. Check your oil supply, and if you see any particles, separation, or it looks hazy or significantly darker than usual, it's a sign the oil has lost its effectiveness. This can lead to engine problems, so always use fresh, properly mixed oil to ensure your 2-stroke engine runs efficiently.
  • Oil can degrade over time, causing additives to separate from the base oil, leading to the formation of sludge or crystals.

 
Thanks for the intel about this. Been boating for over 50 years and never heard of oil going bad like this. Learn something new! Not to mention losing over $300 in the old oil. Amsoil on the way. Might need to pull the floor and clean the remote tanks and change their filters. That will be fun!
 
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Had the same issue with Yamlube some of it made it into the oil tank and clogged my inline oil filter the next time I was out on the water. That day of fishing I had to manually fill the engine oil reservoir. I was planning on switching to Pennzoil but now you are making me rethink the idea. So your experience is that Yamalube is better for the o2 sensor? I clean mine every 2 seasons only use Yamalube.
 
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