A little help understanding Oil Weights - Page 3 - KawiForums - Kawasaki Motorcycle Forums
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post #21 of 24 (permalink) Old 10-30-2012, 06:53 PM
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If your using a chemically derived synthetic such as AMSOIL, a 40 weight is plenty for reducing engine wear. When I see 6ppm of aluminum wear, and 2ppm iron, after a race weekend,, that says it all. I recommend AMSOIL 10w-40 for all water cooled motorcycles. I only reason I change my oil every race weekend, is due to Fuel Dilution. With every racebike i've owned, 4-7% fuel dilution after 300 race minutes. We are always full throttle, and fuel bypasses into the oil very quickly. The 40weight (SAE 40 = 12.5 to 16.3 cST) drops into the 30 weight category with that much fuel. 30weight (SAE 9.3-12.5cST) I'm run AMSOIL 10w30 MC too, but not a good idea with fuel dilution, as it will become a 20weight soon enough.

Using a 50 weight can actually increase operating temps, due to extra viscosity drag.



http://www.youtube.com/watch?feature...&v=vyOKFWZURQQ


Be informed about chemically derived Synthetics.(PAO) Reduced engine wear with extended drain intervals is possible. Oil Analysis Proves everything.


Last edited by Irnieracing; 10-30-2012 at 07:00 PM.
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post #22 of 24 (permalink) Old 10-31-2012, 05:19 PM
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There are a lot of excellent full synthetic oils. Rotella T6 is a 5W40 full synthetic oil available in Walmart for $21 a gallon and it carries the JAMO MA (which means it works for motorcycle wet clutches) rating. I use it in everything. Piaggio uses 5W40 full synthetic oil in all it's bikes and scooters including the Aprilia Tuono V4 for the entire N. American market...Canada, the US, Mexico, so 5W40 would work for sure also. If a dealer recommends a certain brand of oil, it is likely because that is what they make the most money on. People who have no vested interest and know oil and motorcycles usually will tell you there are many acceptable oils. I would use any of them with the proper specs. as written in your owner's manual.
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post #23 of 24 (permalink) Old 11-08-2012, 06:28 PM
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Super Streetbike magazine recently did dyno testing for a 0w-40 Motorex oil and a 15w-40 Chevron Delo oil, and they got an extra 1.6 peak horsepower from the more expensive oil made in Switzerland.

I think they were dumbasses for not comparing Rotella T 15w-40 and the less than zero weight oil below, instead of two 40 weight oils at normal operating temperature, that are seldom used by motorcyclists. Note which magazine has an ad on the page below:

Less than 0W Alisyn Synthetic Oil QuartEngine Oil | Brock's Main Store

“Do…not waste time protesting the self-inflated showmen and bloviating bullshitters who populate our culture. It’s more fun to marvel at them, to appreciate them, to be grateful for them, and to mock them relentlessly. ”-from the 2010 book American Freak Show by Willie Geist. "He wondered what difference any of it would make two hundred years from now." -from the book Cyclops by Clive Cussler.
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post #24 of 24 (permalink) Old 11-08-2012, 06:44 PM
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Originally Posted by Jeff in Kentucky View Post
Super Streetbike magazine recently did dyno testing for a 0w-40 Motorex oil and a 15w-40 Chevron Delo oil, and they got an extra 1.6 peak horsepower from the more expensive oil made in Switzerland.

I think they were dumbasses for not comparing Rotella T 15w-40 and the less than zero weight oil below, instead of two 40 weight oils at normal operating temperature, that are seldom used by motorcyclists. Note which magazine has an ad on the page below:

Less than 0W Alisyn Synthetic Oil QuartEngine Oil | Brock's Main Store

This one time... at band camp...

Of course I'm generalizing from a single example here, but everyone does that. At least I do.


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