Red Line 20W60 or 10W60 for an 8V engine?

[Greyo]

I know some 8V Griso owners here use Red Line 10W60 synthetic oil (as I do):
http://www.redlineoil.com/product.aspx?pid=130&pcid=21

Red Line also makes a 20W60 grade specifically for motorcycles:
http://www.redlineoil.com/product.aspx?pid=111&pcid=21

For the latter Red Line lists the zinc, phosphorous an molybdenum contents (not so for the former).

Any thoughts/reasons for preferring one over the other?

[ferdi]

MG demands a 10W60

[Greyo]

MG demands a 10W60

I know, but my understanding is that what is really crucial here is the high-temp spec, not so much the cold-temp one... of course, if you were based in Scandinavia or thereabouts it would be a different story...

BTW, history teaches that blindly obeying all of MG "demands" might not always be the best thing to do

[Perazzimx14]

I don't think you would go wrong with brand or weight. For the record I bought Agip 10w-60. In all fairness I had to mail order oil to get ??w-60 so I just went with Agip.

[Phang]

I am one of the Redline 10W60 users.

Our local Redline store doesn’t carry the 20W60. I won’t hesitate using it if it is available on the shelves and priced like the 10W60.

I use Redline motorcycle oil (10W40) in my other bike and it is more expensive than the 10W60 per quart.

Phang

[dbarb3]

The 20W60 will be less likely to shear in hot weather

[roofus]

If the manfacturer recommends "X" why would you want to use "Y"?

I don't understand this line of thinking!

[john zibell]

If the manfacturer recommends "X" why would you want to use "Y"?

I don't understand this line of thinking!

At the time the 10W60 recommendation came out, that was probably all that was available, and AGIP was about the only maker. As products improve the manufactures don't necessarily rethink their original specification. If the reason for 10W 60, was to have the 60 weight for heat resistance, the 20W60 would be less likely to loose viscosity than the 10W60, and would therefore be more resistant to breakdown when hot.

[Greyo]

If the manfacturer recommends "X" why would you want to use "Y"?
I don't understand this line of thinking!

And, apparently, you didn't even bother to read the other posts above

Anybody who is familiar with Guzzi bikes knows that blindly obeying all MG recommendations can sometimes lead to rather "unpleasant" results...

[roofus]

If the manfacturer recommends "X" why would you want to use "Y"?
I don't understand this line of thinking!

And, apparently, you didn't even bother to read the other posts above

Anybody who is familiar with Guzzi bikes knows that blindly obeying all MG recommendations can sometimes lead to rather "unpleasant" results...

Ooooo! Somebody didn't get any last night!