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Thread: New 4M oil

  1. #1

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    Question New 4W oil

    Have an '07 fxho and changed oil about 30 hours ago. I did not overfill and was very meticulous about replacing with same amount taken out. Difference was 4W yamalube vs. the 10W-30 they discontinued. Found a couple of posts addressing why they no longer make 10W-30 (apparently compression issues with 1100 motors). Started noticing a bit of oil in air intake case about 20 hours ago. No leaks inside hull whatsover, have checked every time I ride. I was on the lake the other day and low oil warning light came on. Rode to calm water and checked oil. NOTHING on the stick. Added two f...ing quarts the next day on the lake to get it up to par. Took it in today to the shop and had a guy look at it who I have utmost confidence. He couldn't figure out what the heck was causing it do produce oil in the intake case. IT STILL RUNS LIKE A CHARM and I don't notice blue smoke or the same smell with exaust from a 2-stroke...that's what's weird.

    Is it the new viscosity causing this? From 10W-30 yamalube to 4W yamalube? Should I buy an offbrand 10W-30? Where the hell is the oil coming from? It's all fuel hoses inside the intake case. Although it's mostly just a pain in the ass right now, I don't want to overlook something that could really screw my ride up later.
    Last edited by czoltak; 08-27-2009 at 06:06 PM. Reason: My screw up


  2. #2
    800AMSOIL4U's Avatar
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    Try their 10w-40 that should solve your problem. They were having oil consumption issues with the 10w-30.

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    Awamori's Avatar
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    Quote Originally Posted by 800AMSOIL4U View Post
    Try their 10w-40 that should solve your problem. They were having oil consumption issues with the 10w-30.
    Or your 10W-40 right? That's what most of us here are going with these days.

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    Quote Originally Posted by 800AMSOIL4U View Post
    Try their 10w-40 that should solve your problem. They were having oil consumption issues with the 10w-30.
    I was having no problems with 10W-30, I have replaced with 4W(which is yamaha's new recommendation, and only option) now I have oil escaping into the intake box.

  5. #5
    800AMSOIL4U's Avatar
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    Try a leak down test also. To make sure nothing is passing by the rings.

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    Addicted Member 5001craig's Avatar
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    Quote Originally Posted by Awamori View Post
    Or your 10W-40 right? That's what most of us here are going with these days.
    + 1

  7. #7

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    Quote Originally Posted by 800AMSOIL4U View Post
    Try a leak down test also. To make sure nothing is passing by the rings.
    Took the plunge and bought 10w-30 amsoil. Got almost 3 quarts out before replacing. Took it for a LONG test run, checked the oil level after riding and checked the air intake box. Didn't find a drop of oil. Problem solved.

    At least for my ride, Yamaha's decision to switch from 10w-30 to 10w-40 was the dumbest decision they could have made. Wonder if it was driven by the new superchargers on the 4-strokes or maybe the larger 1800cc motor. Anyhoo, I will stay with 10w-30 now and forever on my 07 fxho.

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