Amsoil is advertising that thier recommended oil change interval is up to twice the manufacturer interval, So if HD says change at 5K then this would give you 10K on Amsoil cutting the cost in half to about 6bucks a quart, and if this is proven, I would say Amsoil is a superior synthetic. Has anyone tried this or anything close to that mileage, a blackstone oil analysis would be helpful here.

 

I would follow this even with syn.

 

Regardless of the facts, the key word is ADVERTISING. If they get you to buy it because they say its true then that is all that matters to them.

Yes Im skeptical but oil is oil......just use the oil change interval in the owners manual.

 

Haven't tried it, nor would I irregardless of what it says. Primary and tranny are a different story, but engine oil.........nah, I'll pass.

 

I'll follow the manufacturers recommendations. And I'm happy with Lucas oil.

 

I wouldn't go 10k but then again I wouldn't use Amsoil either. Your bike, your choice. 5K max interval for me...

 

I just think about the reasons we change our oil and to just name a few, contaminates, break down, oxidation, and loss of viscosity so if Amsoil tested well in its ability to control these variables it should be used for a longer period. I am just curious to see how it would look on a blackstone paper after 8K miles or so.

 

I don't care what they advertise. 5k for me. Have amsoil in there now. I will be switching my next change as I don't like the amsoil

 

I do not doubt that the oil will not break down for 10K, but one of the things that oil does is that it's holds the engine contaminates that are drained out during an oil change. I would not the contaminates suspended in my oil for 10K.

 

What problems are you having with it?