Royal Purple when I can get it... and usually 20w-50 because it can get pretty warm in Louisiana.

Mobil Race 15/50
Poul Dam BB2003 turbo

Honda HP4 gold bottle. I switched from Honda GN4 (black bottle) to HP4 at 20,000 miles seems to shift a little better now

I use castrol actice-evo semi-synthetic 10w40 in cold months, 20w50 in warm months

Originally Posted by BLKBRD

Amsoil 10-40W, I haven't noticed any clutch slippage.

Same as above.
However....

What we always seem to go on and on about is oil.

But seriously guys, althought oil is very important, I feel that what you use for an oil filter is FAR more of an issue.

IE; I read a report 3 weeks ago in an Automotive journal. Tests have shown that a good amount of engine wear is caused by particals in the 8-12 micron range.

Most (good ) brands of filters, claim to trap 90% of particals down to the 20 (ish) micron range, most are higher 30-35.

So, the point is, no matter how much or how little you change your oil and/or filter, your still getting hit by the little buggers that are causing a fair amount of the damage.


So, not to jack this thread, but, how small of micron does the filter you use filter down to??

Respectfuly
Lou

The filter IS most impt!!!!
Absolutely true -- it's the tiny stuff that makes wear.
One auto site I read posted results from many diff brands
Fram was the worst (they have pending law suits)
And there were a few best -- Wicks--
Pays to do some home work

Originally Posted by OMG

The filter IS most impt!!!!
Absolutely true -- it's the tiny stuff that makes wear.
One auto site I read posted results from many diff brands
Fram was the worst (they have pending law suits)
And there were a few best -- Wicks--
Pays to do some home work

Absolutley, thats why I changed over to Amsoil, they simply had one of the best filters that I could find.

Prior to my Blackbird I had a Triumph Sprint ST. The dealer called for some kinda 10w50 Mobile 1 racing oil (very expensive) and I eventually switched over to the 10w40 Mobile 1 MX4T with no noticible difference at considerably less expense. Plus, I could buy it off the shelf at AutoZone,etc. I Never encountered any clutch slippage issues or any oil-related problems.

On my '00 Blackbird, however, I have used only 10w40 and/or 10w50 Honda HP4 Semi-synthetic (without moly) primarily because that's what's always been used in the bike since day one (I'm the second owner) and the bike now has about 24k miles. I've heard of problems occuring when higher mileage vehicles (cars and bikes) switch over from standard blends to full synthetic.

The Honda owner's manual says do not use full synthetic oil, but obviously alot of owners do use it, and with no ill effects whatsoever. I think the bottom line, essentially, is to keep your oil changed and clean. Other knowledgeable Honda owners have also said it's really not necessary to change the oil filter everytime you do an oil change. Changing the filter every other oil change is more than sufficient. I use the OEM Honda filters.

[quote=XX4me;7486]Mobil One full synthetic oil. Didn't have any clutch slippage issues until
235hp. Installed new plates and switched to dyno oil and the clutch slipped again at 235hp.
Are you using a stock clutch?

And I believe the filter is also pretty important,I don't know how good the stock filter is but that's all I've used.Also I change it everytime the oil is changed,why leave 300-400cc of dirty oil behind?You can't get it all out but why leave anything behind that is no good anymore.

on the topic of oilfilters:

OIL FILTERS EXPOSED! - Introduction

Makes some interesting reading

cheers
burkhard

[quote=Partsguy;8473]

Originally Posted by XX4me

And I believe the filter is also pretty important...I change it everytime the oil is changed,why leave 300-400cc of dirty oil behind?

You make a very good point. Had never thought of it in that sense.
Even though the filter is still doing its job effectively, you are still leaving
a good bit of dirty oil circulating in the system. Guess I'm getting lazy in
my old age. I just hate to shell out so much money for the OEM Honda
filters each time I do an oil change - but then filters are cheaper than an
engine rebuild.

hi , you should never use a full synthetic oil on a low millege cbrxx.

Originally Posted by garybjpps

hi , you should never use a full synthetic oil on a low millege cbrxx.

Which has been said many times by many people,you want rings to seat in the cylinders and bottom end bearings to move freely(thus gaining hp).So obviously synthetics work at preventing metal wear,therefore once an engine is broken in use synthetic oil.

Hi thanks for the reply.....

Honda bikes burning oil through use of the wrong type of oil (namely synthetic) and MOLY based synthetic oils emulsifying and blocking oil ways! So always use 10/40W mineral oil for at least the first 8000 miles of use! Always use a trusted brand such as MOTUL, CASTROL, SHELL, HONDA or SILKOLENE to mention a few of the better known brands.

Have not changed the oil in the XX yet. I have used Motul in my VTX with no ploblems and Silkolene in my wife's Shadow same deal. I use K&N filters . I will do the same with the XX. I would like to try Royal Purple but I can't find it anywhere local. Oh well... Motul, Silkolene, Amsoil or whatever synth is fine, it's the Moly's that kill your clutch!