I know this topic has been discussed in past threads, too many. Which oil? I have a 2003 400i man. I plow in the winter and ride trails in the summer. Just over 100 miles , time to change per manual. I bought a kit from Gander Mountain 30$ AC oil and filter, "synthetic all season extreme 4 cycle oil 0w-40." I don't plan on using the oil yet. From all I have read on this sight 200 to 500 miles on syn. changeover seems to be the way. What oil ? Does it make adifference from summer to winter? Cat came with reg oil not syn. I asked the dealer. Going riding tomorrow 60 degrees in january no snow but lots-o- mud! [img]i/expressions/face-icon-small-happy.gif[/img] All replies appreciated

 

if its gonna stay warm till your next oil change use the reular 10w40 cat oil, otherwise use the regular 5w30 cat oil, then at next oil change use the cat syn oil, im going to change over to amsoil my next oil change

 

I use Amsoil 0w-40 for the Atv's and it works great. I run Amsoil in everything I own. Email me if you have any questions about it Jtls67@yahoo.com

 

10w40 Castrol, I know it's not for everybody but as often as I change my oil, I think I
could use anything!

 

Use a petroleum based oil until 300 miles then use the Cat 0-40 oil. Just make sure the oil is compatible with a wet clutch system. Most motorcycle oils will state it on the can.

 

I live in texas it gets pretty hot so i use mystic jb-8 15w 50. i have tested and shown that it reduces oil temp 20 to25 degrees cooler.[img]i/expressions/face-icon-small-smile.gif[/img][img]i/expressions/face-icon-small-wink.gif[/img][img]i/expressions/face-icon-small-sad.gif[/img][img]i/expressions/face-icon-small-blush.gif[/img][img]i/expressions/face-icon-small-disgusted.gif[/img][img]i/expressions/face-icon-small-blush.gif[/img][img]i/expressions/face-icon-small-sad.gif[/img][img]i/expressions/face-icon-small-wink.gif[/img]