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[RoadKingCurley]

Originally Posted by newultraclassic

Lots of people complain about the noise in the TC engine. Alsmot universally, Harley owners and dealers recommend 20w-50 for all of their bikes.

A little mentioned fact from the 2004 Touring Owner's Manual shows Table 41., Recommended Engine Oils. HD says that anything over 60 deg F. you should be running 50 wt.....that's straight 50 wt. in your T.C. Furthermore, when the temperature reaches 80 deg. F and higher,(That's almost all of the time here in Cal. in the summer) they show that you should be using straight 60 wt., NOT multi-grade.

Now you may agrue that 20w-50 is still 50 wt when hot and I might agree. But, if that's really the case, why does HD say to use straight 50 or 60 wt?

I run my Shovelhead on straight 60 wt. year around in California here and it's pretty quiet. I wonder if we aren't running too light an oil in the T.C.'s?

Yes, I installed the Baisley Spring, too and it made a noticeable difference. BTW, I use 15w-50 Mobil1 in my TC. It's very quiet since I installed the spring.

Go figure.

FWIW, Harley has changed their specs and now reccomends 20-50 in everything, engine, tranny and primary. At least that's what the mechanic at the dealer told me. I run 20-50 Amsoil or 15-50 Red-Line w/ an oil cooler on my bike. In the winter I run 15-40 Red-Line Diesel. Never had a problem. Just my