Originally Posted By: Craig750
Originally Posted By: molko
Originally Posted By: Craig750
In a lot of the Japanese sport bike manuals they specify "use" or possibly "only use" 10w40 for example. But if you read further they will quite often have a chart with different weight oils and temperature. For my GSX-R750 k7 and my k1 1000 I can use a 20W50 in summer in Australia. I go with a 15w40 or 10w40 for the other months.
Only is a little inflexible in my opinion. If you intended to run this thing in sub freezing temperatures I think most people would agree that a lighter weight oil would be a wise option. On the other hand Singapore is a little warmer than most countries on average so I would feel safe even with a 20w50. Your cold starts are never likely to be cold in comparison to most other countries.
I Already Check Properly My Manual..
Its Say "USE"..15w50..Not "ONLY USE"..
Like U Said,It Be Wise To Use Motul 10w40..
But It Would Be Save To Use Motul 15w50..
Basically,Im Not Doin Any TrackDay Yet With The Bike..
Not Anytime Soon..
Just Normal Everyday Riding To Work Place..
Which Is 5km From Home..(Singapore Is A Small Country,Hehe)..
Guess I'll Be Trying,The Motul 10w40 1st..
See,How It Goes..
& How Far Will It Last..
molko, I am NOT saying to use 10w40.
But a couple of others here agree with your manual and Aprillia and say if it says use 15w50 then USE 15w50 only.
Keep this in mind also. Mobil 1 Racing 4T 15w50 is thicker than their 20w50 according to the product data sheets.
So strictly speaking, I ask how critical is it that it be 15w50? If anything you would be better to stay at 15w50 or 20w50 than go to 10w40 for Singapore weather.
Ok..
Im Sticking To 15w50 For My Next Oil Change..
I Have Read More Bout EO Temp Range..50Grade Suits In Singapore,Also Im Running It On Vtwin Engine..
So U Said,Mobil1 Racing 15w50 Is Thicker Than Their 20w50..
How Is That So,Aren't They The Same Grade..??
Which Means,Currently Im Using Maxima Extra 15w50..
It Has A Different Thickness From The Motul 300v 15w50,Even They Have The Same Grade..??
How Can I Check Their Differences In Thickness..??
Really Sorry..Noob Question..I Noe Nuts Bout 4Stroke Oil..
Thanx..!