we had used a LOT of 20w50 oil while at mmi, then again just about everyone in phoenix uses 20w50. some days it was like 80 hi, vs 32 low in dec. so the 20w50 was quite usable there, dont know about other places.

Quote from: BUZZIN

Some oils are high in the Anti-Wear package, and others are high in Acid-Neutralizers.  Dirty oil is dirty oil...so the oil and the filter should be changed often.  The manufacturers that tout long intervals between changes are high in Acid-Neutralizers.

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Well, some are high in both neutralizers and anti-waer. If you use a better oil filter, you keep the circulating oil from getting "dirty" as fast. That combined with a more stable base stock can allow longer change intervals.

I've been using Amsoil's 10W40 motorcycle oil and oil filter in my 98 GS for about 1000 miles now.  When I researched things, I found they include more zinc and phosphorous than any other motorcycle oil.  Their independent lab results using the 4 ball wear test shows very little metal scarring and they consistently beat out the other so called high quality oils.  

The Amsoil oil filter price is comparable to the K&N oil filter.  They both are very high quality filters--they ain't no Fram, baby!

In the end, you really get what you pay for.

My buddy is a dealer. Im gonna have to help him out and buy my oil from him.  :mrgreen:

I will start using synthetic after the motor is good and broke in... Amsoil it is.

The small side notes to Kevin and Snowman...
The bike even if it has ~5K miles basiaclly is loose enough that there isn't going to be any tight spots where 10W40 can get in but 20W50 cannot. The bike is very very loose in all bearings. The only thing sloppier probably is a harley. The bearings all fill up with oil just fine, the bike is not capable of retaining high oil pressure and there is no worries with 20W50. In fact I barely made 5psi with 20W50 on my 90 with 5K miles at idle. You need pressure also but flow is more important in most places.
Cushioning is needed for a loose motor more than a tight motor. Tight motors will make and retain pressure and you put in 10W40 and you get the added benefit of quick (still just fractions of a sec) pump up and the bikes bearings are tight enough to keep a thin layer of high pressure oil. BTW a 99 600 GSXR made 15psi at idle with 10W40 in it. Cushioning surprisingly is better with dino than with synthetic cos the synthetic it too slippery it flows right off the places like cam faces and shims. When the cam lifts off the shim that gap takes on a little oil, that oil should stay there till the cam comes back to the shim...synthetic get out of the way faster than dino...But its still a very small diff and the benifits of synthetic far out weigh the issues.
Cool.
Srinath.