Amsoil? Harley Oil & Lubrication Discuss Amsoil? in the Harley Tech & Harley How-to forums; I have never had a new bike and want to keep it in good shape. If I use Amsoil motor oil and change it myself will that void or hurt ...

[sixraven]

I have never had a new bike and want to keep it in good shape.
If I use Amsoil motor oil and change it myself will that void or hurt my 2 year unlimited mileage warranty?

I have used it in the past in used bikes that I have owned.

Thanks
L

[BluesFan]

Changing it yourself is OK.

Using a non API certed oil is not.

Amsoil says they will defend any warranty claim, but you'll still be bikeless for that time.

It's good oil, but there are equally good API certed oils out there. Look for the circle logo.

And stick with the 5 micron filter.

[1996Fatboy]

Are all filters rated in microns? I read that my Evo is happy with a 30 micon filter yet a TC needs a 10 micron. Can I run a 10 in my Evo or is it too restrictive? Thanks to all who posted about oil types. I can't see paying twice the amount for the same thing just because of the name. Now if it is because of where it's made than that's a different story. If it can be had made in the USA then that's what I buy. Sorry Sixraven, didn't mean to jump into your thread for my issue but thanks just the same.

96

[BluesFan]

No, all filters are not rated. Most manufacturers are happy to sell without telling you what you are buying.

2 kinds of ratings exist.

Nominal - a filter has a certain size hole in it and will generally not pass a particle above that size. Determined by measuring the filter media holes.

Beta - Filters are set up in a test stand a fed a steady supply of test dirt. Carefully prepared. The input and output streams are compared and actual filter efficency is obtained.

Beta is a more involved precess and a more reliable indisator of filtering ability.

In the motor vehicle world, you'll see things like 95% efficient at xx microns for it. Read a Fram toughgard box for an example.

Industrial filters will be something like Beta 2,000 @ 5 microns

As for a 10 micron filter in an Evo, my gut is smaller is better, within limits. I'd do it if it were mine to do.

You might, just might, open up the bypass under some conditions. So what? You're still filtering most of the time at full flow.

We rarely run full flow filters here, the term is a kidney loop, filter a small portion very well and eventually you clean it all up.. And we're talking millions of lost generation if I screw that up.

[Sunday]

Amsoil is likely a very good product. However, Amsoil marketing people have historically talked about Amsoil coming about because the company's founder was impressed with synthetic oil's use in jet (turbine) engines and the duration the oil could be used in that type engine. From this, they make the leap to internal combustion piston engines, and even state that Amsoil (synthetic) oils' drain intervals could be greatly extended in piston engines. To me, this has always shown a basic misunderstanding of motor oil use conditions or a simple marketing exaggeration by Amsoil. Oil in jet (turbine) engines is only used to lubricate and cool bearings, usually ball or roller bearings; it is not exposed to combustion exhaust products. In piston engines, besides lubricating and cooling bearings, the oil also lubricates sliding metal surfaces and is certainly exposed to the adverse chemicals and moisture of piston blow-by combustion gases. Therefore, any suggestion of an extended drain interval, by using Amsoil oils, beyond the vehicle manufacturer's recommended intervals should be questioned.