i use sythetic in engine and tranny. semi synthetic in primary. recommended by my indy. bike feels the same.

 

I use semi synthetic. That way no matter who wins this age old argument, I got the right stuff in my bike.

 

Go syn. You are only talking a few bucks more.

 

I use car 15w50

 

Anybody using that Royal Purple stuff...........??
If so why ,why not.......??

 

Mobil 1 for me because its the easy to find. Redline in there now because it came back from the shop that way.

 

maybe I can take this down a different track. (and get a new oil discussion!)

Do any cars acutally use 15W-50? Other than 200k+ mile beaters that need 50 weight just to fill the huge gap between the bearings and journals....

I saw an opinion somewhere that the oil companies expect that the 15W-50 (20W-50, 20W-60, etc) type oils are actually being used in air-cooled engines (read: mototcycles).

wadayathink?

 

I'd be interested to see that article, if you can track it down!

 

i seen it at walmart for 4.50 a quart , down from 8.65, it says its is for use in harley's eng,tran,and prime. figuring the are both synthetics(20-50) so i shouldnt have an issue right?

 

That's what is in my bike now...Got real tired of spending OVER $10.00 a quart for what I was using and yes it's synthetic. Good to go...