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First off I want to say that I am not affiliated with Amsoil in any way! I am in the Air Force and just wanted to give my opinion on their products, well the oil at least.

I have a 2009 Rancher 420AT and I was due for an oil change so after quite a bit of searching I decided to go with Amsoils 10W-40 Advanced Synthetic Motorcycle Oil, and what a difference it has made.

My biggest complaint about the rancher, well besides the seat, is the rough shifting transmission. I had read that the Amsoil would smooth it out some so I had to try it, and what a difference it made. It is a night and day difference, it shifts so smooth now that shifts in automatic are almost unnoticeable. That alone has made me a believer. I will use Amsoil in both of my ATV's from now on. Yes it is a little more expensive, but since I am not changing the oil monthly it is soooo worth it.

Sorry it is a little long, but that is my 2 cents.

SS
 

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Thank you for sharing your experience...
 

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I run the Amsoil formula 4 stroke in my TRX450ER in the crank case and trans have no complaints very happy.
 

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First off I want to say that I am not affiliated with Amsoil in any way! I am in the Air Force and just wanted to give my opinion on their products, well the oil at least.

I have a 2009 Rancher 420AT and I was due for an oil change so after quite a bit of searching I decided to go with Amsoils 10W-40 Advanced Synthetic Motorcycle Oil, and what a difference it has made.

My biggest complaint about the rancher, well besides the seat, is the rough shifting transmission. I had read that the Amsoil would smooth it out some so I had to try it, and what a difference it made. It is a night and day difference, it shifts so smooth now that shifts in automatic are almost unnoticeable. That alone has made me a believer. I will use Amsoil in both of my ATV's from now on. Yes it is a little more expensive, but since I am not changing the oil monthly it is soooo worth it.

Sorry it is a little long, but that is my 2 cents.

SS
What oil where you using before the Amsoil? My Rancher shifted rough when I first got it. After putting in Mobile 1 it shifts great with barely perceptible shifts. could be that using the wrong oil viscosity is causing the hard shift problem. certainly the synthetic should help with shift performance in cold conditions. Im not sure what was in my unit when I first got it.
 

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I am a preferred customer, paid $20 for "preferred" license that gives me dealer cost on all their products. I don't have to purchase from any dealer, it comes direct to my door!

I purchased oil for all my quads, differential, polaris tranny oil,2 stroke oil, spark plugs, and oil for my car and truck. When I first changed the oil in my 450ER with 0w40, I'm not kidding when I say it quieted down a bit. Their white papers showing all the brands that I used to use...put them all to shame...mobil 1, royal purple, etc. And it's cheaper too! I was paying $8.99 per quart of royal purple, and I now pay $7.85 per quart and can go 25,000 miles between changes. With royal purple, I was doing 8,000 miles!

Most people don't know it, but they sell everything! Wiper Blades, NGK plugs, fuel additvies, bypass filters, hydraulic oil, grease, even vitamins....lol etc. You can literally buy all of your car and ATV needs there. The best part is they have a 35,000 mile oil for my trucks.

Extended Oil Change: The 35,000 Mile Extended Oil Change

I use their EA Filter. I have purchased over $300 in products in the past 2 months.


PS. I purchased oil for my brother-in-law and shipped it direct to his house. He paid me for all of it. I have no way of doing that for members of the forum, but if you have "buddies" or relatives, one of you can be the 'preferred customer', and have it shipped to wherever you want. I'm going to be a longtime customer for sure!
 

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ohh, and let me add, that MANY people are using 0w-40 in their quads. They sell a 10w-40, but you are safe to use the 0w-40. It offers the same protection, AND it is rated down to -30 (I think). So for you guys that are in the cold country, the winter '0' rating will allow you quad to start shifting LONG before your buddy gets his quad heated up! :) Decreases the cold starts too!
 

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I've been using amsoil 0w-40 in my rancher 350 for several years now. Last weekend I went on a trail ride in north western wisconsin. COLD! -30 and started right up! I also use their gear oil. Very low resistance in cold weather.
 

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WAIT WAIT WAIT! YOUR FROM WINCHESTER!!!! WHAT PART!!! I live out towards Gainsboro area. I also did a year in the Air Force but was discharged after getting injured. Did Sgt. Heflin put you in???

And of course thank you for serving.
 

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not that i have anything against this ami-oil..lol..but..just wanted to ask something on this ( yes..i use honda brand oil ..lol )..anyway..lets say you buy a brandnew atv..and you take it home..you change to this ami-oil..something goes wrong..you take it back to the dealership to be fixed under warranty..and they find out what oil you got..and it's not honda oil..do they sucker you for repairs ?..or are you gonna be covered ?..just wondering here.
 

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had my 1985 xr600 at the mechanics place, upon pickup and test ride I asked > what did You do to the tranny it shifts smoother ? He just grinned and said amazeing aint it? its "amsoil" thats all I did to the tranny / I cleaned the carbs etc etc but the trans shifting is all due to synthetic oil - I am hooked now on synthetics in cycles -I have switched My Wifes ATV over to royal purple max cycle and that also improved the shifting and it seems to run cooler, next oil change on My 85 fourtrax 250 will be to a synthetic oil -
as far as not meeting Honda requirements for warrenty - I would assume "shadetree" is correct and would not chance it with out looking into it further ? but amsoil in My old dirtbike is working well ! royal purple, max cycle in Wives atv is working well also ! every thing just seems a little smooooother ,
I am 48yrs old certainly not racing or evan running hard , and still I sugest synthetics -try it ! You will like it! and be certain to use the cycle / atv , blends so the clutch plates still get the sticky they need !
My 70 yr old neighbor cringed when I told Him I had amsoil in My bike His experience some 20+ yrs ago was He had to remove and rinse amsoil from His goldwing . as the clutch slipped with the old formulas, that is all good these days with the cycle blends !!
 

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I don't see a problem with running other brands of oils as long as they meet or exceed the requirements of the manufacture ,check with you dealer to be sure, I also run amsoil formula 4 stroke an it great stuff.
 

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The fact is that Honda, like so many other "brands" of oil, contract with one or more oil companies to make their lubricants. Every manufacturer that makes equipment with an engine has its own name on an oil bottle. That includes all the major auto manufacturers, the makers of motorcycles, ATV's, snowmobiles, lawnmowers, farm equipment, you name it, they all have oils. But none of these equipment manufacturers actually makes oil. They sell oil to make more money, and they often price these oils well above the going rate for competitive lubricants because, like Honda, they can specify or create the impression that only their oil be used in their equipment.
 

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i have a 2011 rancher and it shifts hard very harder dealer says it normal it has hard stiff clutch packs so ur telling me to switch to amsoil and the problem will go away and also will using honda oil the change light pops up so if i change over when the lgiht still come up and do i ignore it when do i know when to change it
 

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There is really no way to guarantee that. One thing I have encountered with Honda ATV is that they are very sensitive to the correct oil level. It is important you check the oil exactly as your owners manual states if you have an auto trans. Pulling out the dip stick with engine off will not give you the correct reading, it will always show over full but its not.

The oil light is programed to come on a specific intervals and it has nothing to do with the type or brand oil you are using, its time and mile based trigger (programmed). Just follow to manual to erase the light. I change the oil on my Rincon 1/yr, usually that is about 500 to 700 miles using AMSOIL and always have with my Honda ATV's.

Caveat - Whenever you bury the machine in water YOU MUST change the lubricants especially in the axles.

Hope this helps.
 

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i have a 2011 rancher and it shifts hard very harder dealer says it normal it has hard stiff clutch packs so ur telling me to switch to amsoil and the problem will go away and also will using honda oil the change light pops up so if i change over when the lgiht still come up and do i ignore it when do i know when to change it
Try adjusting the clutch free play and see if it helps, unless you have the auto tranny model.
 

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not that i have anything against this ami-oil..lol..but..just wanted to ask something on this ( yes..i use honda brand oil ..lol )..anyway..lets say you buy a brandnew atv..and you take it home..you change to this ami-oil..something goes wrong..you take it back to the dealership to be fixed under warranty..and they find out what oil you got..and it's not honda oil..do they sucker you for repairs ?..or are you gonna be covered ?..just wondering here.
Same questions get raised with automotive industry. Amsoil gives a great explanation here:

Warranties and the Magnuson-Moss Act

An interesting tidbit from the article, that I had no idea about:

Synthetic motor oil was introduced to the automotive public in 1972 by AMSOIL, INC., with the world's first API rated synthetic motor oil specially formulated for long service and superior performance and protection to that of conventional oils.

So if you are buying Amsoil, you are buying from the pioneers.
 
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