I was told by the person at Amsoil that this filter wasn't recommended for higher RPM as it wouldn't have adequate oil flow for proper oil pressure. If you have contradicting info please share; as one more choice is always welcome. Oddly enough no filter recommendations for the SFS on their site??
Yes, very good points.
Amsoil is a very conservative company in that they don't recommend something that they think is not 100% suitable.
So they won't make a recommendation of their EAO filter to stay on the safe side.
I actually don't know about the suitability for my application in a 1098 Streetfighter regarding outright oil flow.
However I don't think it is a problem below 8250 rpm. The reason is, that filters in their range are recommended for the Harley Davidson V-Rod and that's what they rev to(or more) with 20w-50 grade oil.
I personally don't ride at above those revs all that much with the Streetfighter, although I have been known to go to just short of the rev limiter at times, and hit the rev limiter very rarely.
But I am consistently very smooth in my riding style and I don't set out to abuse the machine. (if I can help myself
As a precaution I do regular UOA's (every oil/oil filter change at 6000 kms) and there is absolutely nothing in terms of wear metal contaminates, that stands out as flagging a problem in regard to oil starvation.
keeping in mind that it's a shared sump engine/transmission.
And the low oil pressure light has never come on.
Consider these levels of wear metal contaminate numbers for every 6000 kms.
Ranging from 44 - 52 PPM of Molybdenum. (The VOA reveals a baseline number for Molybdenum in the oil of 46 PPM)
Ranging form 31 -40 PPM of Magnesium. (The VOA reveals a baseline number for Magnesium in the oil of 14 PPM)
9 PPM of iron. (consistently)
Ranging from 4 - 6 PPM of Copper.
Ranging from 3 - 5 PPM of Aluminium.
1 PPM of Lead. (consistently)
1 PPM of Nickel. (consistently)
<1 PPM of Chromium. (consistently)
<1 PPM of Tin. (consistently)
Ranging between 0.5% - 0.2% for Fuel dilution, with 0.5 being an upward spike due to a defective coil on 1 cylinder.
Oil viscosity is consistently still well within grade for a 20w-50 at 100 degrees C.
But viscosity is a little low at 40 degrees C, but still within grade.
It effectively becomes a 15w-50 grade oil quite quickly in service and stays at that state for the entire OCI.
Yes I'm potentially taking a chance, but from the above data I think I'm going just fine.
In my dealings with Amsoil and their technical department. I have come to the conclusion that they do have a set of standard (carefully crafted) responses for every potential situation regarding their products suitability.
If they(Amsoil) believe they don't have something for you, then you will get one of two types of responses, and they will not enter into discussions on any matter.
The first type of standard response, is an excuse of some description. Whether it's factual or not, who knows?
The other response is to deflect your enquiry away in a manner that is also(carefully crafted) in order to motivate you to "go away" if they can't respond with one of their canned responses, simply by stonewalling you.
It's literally a dead end.
So in summary.
I took a gamble on the suitability of their filters anyway, for my application in real world riding conditions.
Even though a UOA is not absolutely conclusive, and a substandard tool to monitor the mechanical condition of a machine.
I think that so far, it's all good.
Another service interval is coming up soon, so we shall see in the very near future if my gamble is paying off.
So far, I believe the filters are fit for purpose in my application
However, I will make an effort to check and record oil pressure when the next service falls due
What are your thoughts?