what oil should i run in my 400ex

[rancher350rider]

ok i just got a used 400ex and i was told by the old owner to run Mobil 1 15W50 i read sum old post on it and wnated to know what do yall run should i keep runing Mobil 1 15W50 or should i run sum thinking eles also where do u buy ur stuff at
thanks

[Rico]

run synthetic no matter what.

[atvracer980]

Castrol 20-50w atv blend- been running it for 4 years now- no issues

[rancher350rider]

where do u get that at

[TWEP]

Honda 20/50 cant go wrong with it :)

[blasterandy]

I run the 10-w40 in summer vs 20-w50 winter. And i run castrol anti-sludge synt.

[2004exrider]

Originally posted by blasterandy
I run the 10-w40 in summer vs 20-w50 winter. And i run castrol anti-sludge synt.

I hope you mean 10w40 in winter and 20w50 in summer.

Jimmy

[jokester]

I run ams oil 0w-40. its a bit pricy, but so far my quad runs the smoothest on that.

[blasterandy]

I have dyslexia:ermm: , but yes vice versa :D , i normally catch those types of mistakes and do the edit. if you could see how many edits i do it would amaze you i edit almost every post and most 2&3 times :)

[hornetgod13]

Valvoline ATV 10W-40 Oil. Made specifically for quads. Provides wet clutch protection as well. It's $2.35 a quart at Autozone.

http://www.valvoline.com/pages/products/product_detail.asp?product=77

[blasterandy]

I might switch to that.

[flauge]

Klotz mx4 for me. The smell alone is what got me to use it:blah:

[ImplodedMindZ]

I run rotella T, 15-w40 I think. Heard some good things about it. thought i would give it a try.

[jsmith2232]

I run belray semi synthetic thumper 20w-50w, it seems to work great.

[Def-e-nition]

Im assuming that there is a modification needed to run full synthetic ?
I have been warned more than Once not to use synthetic as the Clutch starts slipping - my understanding is that bikes of SG grade oil do not particularly enjoy the use of full synthetics .

i must admit to wanting to throw synthetic in myself , but up until this point have not bothered , due to the warning about the clutch .

Whats the verdict on this , and am i correct about the springs on the plates ?

[coryatver]

just don't use the synthetic with friction modifiers in it