Silkolene Pro4 15w-50 analysis

mountainmotor

Donating Member
I know quite a few here are using this oil so I thought I'd post this report just received . This is defininatley one of the better oils available and is one of the lowest wear metal reports I have ever seen of a bike motor . Remember though that these ZX-9R's have one great airfilter and stopping dirt ingestion is key to a good report .

This is a great choice in oils for the street Busa with the motor warmed up with aftermarket cams and valve springs . The nickel from the cam buckets and iron from the cams and transmission is extremely low showing great protection as the factory cams in these things are hot ... much hotter in lobe intensity than stock Busa cams for comparison .

This oil was used for aproximately 13 months and aprox 3800 miles in a 2001 Kawasaki ZX-9R . The engine was ran fairly hard every time out but not abused . It also was rode every month of the year . Stored in a climate controlled building .

My opinion is this is easily one of the best top 5 motorcycle oils currently available in North America even though it thinned just about one centistroke .

And look ! This is a motorcycle specific oil that uses moly in the formula ... ya know , the friction modifier with the reputation of making clutches slip .   Will the rumor ever die ?



Engine has 8877 total miles and the oil was replaced with Synergyn 15w-50 which I feel will offer equal protection at 1/2 the cost . In another 3800 miles I will drain it for comparison .

Wear metals
Iron 7
Aluminum 16
Copper 9
Lead 2
Tin 1
Nickel 2

Additives
Silicone  11 - defoament plus dirt ingestion
Barium 0
Moly 158
Calcium 1917
Magnesium 315
Phosphorus 1186
Zinc 1257
Viscosity 14.23
TBN 6.50
 
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