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Discussion Starter · #1 ·
it's an oil weight thread.

My dealer put 10-40 Golden Spectro in at the 600 mile service. Today I changed the oil at 2600 miles. I used the 20-40 Yamaha oil - which is only $12 a gallon. I can't tell the difference in engine performance or sound.
So what do you think, is 20-40 better than 10-40 for summer riding? :mrgreen:
 

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joecbr1100 said:
it's an oil weight thread.

My dealer put 10-40 Golden Spectro in at the 600 mile service. Today I changed the oil at 2600 miles. I used the 20-40 Yamaha oil - which is only $12 a gallon. I can't tell the difference in engine performance or sound.
So what do you think, is 20-40 better than 10-40 for summer riding? :mrgreen:
Joe, there is an absolute wealth of information available through the search function particularly regarding the "consumables" of bikes - oil, fuel, tyres. There is a couple of links to articles which are very comprehensive. Search calsci oil or something like that and all will be revealed.
 
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