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FoxRacing81
03-12-2005, 06:51 AM
My mechanic tells me that's the only kind of oil I should run.
I believe him, I just want to see what other people's opinions are.
Seems to work okay for me. But is this the best oil to run?
If it's not, I would like to know what is. I don't want to run synthetic either.

-Mx
400EXracer74
03-15-2005, 08:45 PM
thats what i run in my 4 wheeler. i wasnt told to its just cheaper than honda oil so i use it. its been working well for me for a year now
03ChevyX
03-17-2005, 05:38 PM
yea i run the castrol 10w-40 it seems to work as good as the Bel-Ray i used to use
Jimford
03-18-2005, 11:32 PM
I use mobil red cap. Got the idea on an older thread here. I think any good name brand is good. The key is to change you oil often. I change mine every 4-6 rides. Changing the oil filter every other time. It sounds crzy but I believe that why my 99' 400ex has never had a problem yet!!
balls2da-wall
03-20-2005, 07:47 PM
when you say castrol...does that mean Castrol Syntec? Thats all i seem to find
sjc115
03-22-2005, 10:51 AM
Castrol Syntech is a semi synthetic blend.

The Castrol 10w-40 that most people run is Castrol GTX. It is conventional oil like the Honda GN4. You can get it at any auto parts store or even Walmart for about $2 per quart.
FoxRacing81
03-25-2005, 07:32 AM
Originally posted by sjc115
Castrol Syntech is a semi synthetic blend.

The Castrol 10w-40 that most people run is Castrol GTX. It is conventional oil like the Honda GN4. You can get it at any auto parts store or even Walmart for about $2 per quart.

Yeah I got mine at K-Mart lol...you can get that stuff everywhere.
reyes
04-07-2005, 05:19 PM
Have you guys check the clearance of your valves? how often are u suppose to do that? Mines are a little loud any feed back will be appreciated.
Thanks
balls2da-wall
04-07-2005, 06:48 PM
400ex's are known for there ticking sound...i check the valves about every other month...
reyes
04-07-2005, 07:21 PM
How often do you find them out of limits? and what is the difference in the loudness of the ticking when you tighnten puppies up?

Thanks for the reply ! hoss
balls2da-wall
04-07-2005, 07:51 PM
Umm usually the arnt too far off..i would say maybe check them every so often....an ex will always tick loud even when the valves are set...no popb hoss'enda
reyes
04-07-2005, 08:10 PM
what oil weight you guys use on your EX me 10w40 maybe since am in florida were is hot i should be using something thicker what u think maybe the- thicking will minimize???