[eric]

ok will im looking to change my oil in my trx 400ex but i want either want to put synthetic or semi synthetic whats better and also what weight the bike has like 30 hours on it or maybe 40 i dont remember and this will be the first oil change its not dirty but i would just like to run a different oil in it

 

[Red-Rider]

I am a big fan of Amsoil. But, any oil will work fine so long as its suitable for motorcycle/atv clutches, and you keep it and the filter changed regularly.

I do have a couple Amsoil testimonys:

I used to have a '99 400 EX, after about 5 years of hard, hard riding, I thought I had bent a shift fork. An ATV mechanic friend and I tore into the engine to replace one of the forks. He was amazed at how clean my engine was, and how little wear was in the cylinder. I had been using Amsoil since after break-in..........the "bent fork" turned out to be noting more than my brand new stiff boots, the first time I wore them I took a big hit from a log, hard enough to bend my shift lever backwards. I bent the lever back into shape and started having trouble getting from 2nd to 3rd. After replacing the fork, I still had trouble shifting, but not while wearing my regular shoes. Solution= keep the boots oiled.

I also use Amsoil in my 2000 silverado, a couple years ago I tried to save $$ by switching brands. I noticed after the truck sat for a couple days, upon startup the valve train would rattle for about a minute. Going back to the good stuff, the noise hasnt been heard again. My best guess is that sitting so long, oil drains from the top of the motor and takes a minute to coat all the rockers after startup. I cant prove its the Amsoil, but I am a believer.

sorry for the book

 

[69quadracer]

Amsoil, its good stuff!! I run the formula 4 stroke it works in both the crank case and gearbox

 

[tomgodd]

I use regular old GN4 from Honda

 

[jasonjlandry]

i am a sales rep in south louisian for shell andd valvoline oils. i did not like paying the 6.00 a quart for honda oil. i took the specs off of the honda oil and called shell - the rotella t3 oil in a 15w40 is the exact same spec as the honda gn4 oil. i also was interested in synthetic . the rotella t6 full synthetic 5w40 is the same grade but in a full synthetic. my nephew had a honda 90 for his son that smokes a little. switched to the rotella 15w40 and no more smoke. i run rotella 5w40 full synthetic in all 4 of my bikes. rotella does not havea high deterrgent like regular oils so is does not affect the clutches.

 

[eric]

i have decided i dont want full synthetic i want semi but ya a guy at my dads work is a certified dealer for amsoil so ill prob get it through him