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Radical oil suggestion--straight 40 wt.

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My opinion on the air cooled bikes: NEVER use anything less than 20W50.

I run 20W50 year round (water cooled too) and don't have any problem even in freezing weather because I start the bike from the garage.

The bike I just bought had new 10W40 Honda oil and it would hardly shift when I was crossing the desert. It was as thin as water when I checked it.

The change to 20W50 in El Paso immediately fixed the shifting problem.

So: For hot summer riding, why not just switch to straight 40 weight?

I am not the only one suggesting it. Check out POWEROLL:

http://www.powroll.com/tech_specs_OIL.htm

The only drawback I envision is you might need to wait 5 minutes while the bike warms up.

It makes sense to me. Has anybody done it? Please speak up?

Joe

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it will just be too thick on startup and prolly have some problems with oil circulation. Not sure why you think straight weight oil would be any better, 20/50 works perfectly on air cooled bikes. Would not recommend changing different weight oils on bikes, use what the manufacturer recommends, ie 20/50 in winter on an water cooled bike that im sure 10/40 is what they say to use.

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Even 20W50 is still built on 20W stock oil. Running all day at 250 deg F is working the modifiers to the max. From the Powroll pitch:

POWROLL 40w RACING OIL

Specifically designed for use in harsh or high temperature conditions, this straight-weight oil will not break down, even under severe loads. A Micron Moly oil with 100% paraffin base and Soluble Moly added as a friction modifier.

POWROLL 20w50 OIL

Easier starting in cooler climates, but with heat resistant properties similar to our 40wt. Better pourability below 30 degrees. A great option for ice racing.

Running all day in the Texas summer heat is certainly "harsh" in my estimation. Since I don't purport to know more than Powroll, I will buy some and try it this summer. I will let everybody know how it works.

Joe

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to each his own try it out and you tell us how well it works then. Me ill stick with the tried and proven 20/50 thats been used in the air cooled pigs for decades. Let us know how it works

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