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New to the forum so I am stumbling around a bit. A question for you guys in the know, is it a good idea to use a full synthetic oil in my sump? I have a 2001 Foreman 500 Rubicon that I have had since it was new and two 2009 Recons. I have never used synthetic before in them until recently. A person told me that synthetic may not act right in the gear box. I thought synthetic was the best and greatest. Any thoughts out there?
 

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Yep, and it will suck just like when a tranny slips!!! LOL
 

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I'm running mobile one synthetic 20-50 in my quad. Its the one for v-twin air cooled harley engines.

My dads neighbor has a oil temp dipstick in his harley and he said ever since he switched to the mobile one v twin oil that his bike runs 10 degrees cooler than with mineral oil.

Its kind of expensive though at about 10 dollars a quart. My other quads and three wheeler I run the mineral honda 10-40 and have never had engine failure, but I change my oil ALOT. Probably more than needed, but its fun.
 

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Has anyone used sythetics in the automatic transmission models? I use full synthetics in my watercooled motorcycle with a wet clutch without any problems. I just make sure they don't have any anti friction additives.
 

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SENTHETIC IS NOT FOR WET CLUTCHES! it is great for Cars, trucks, van, and hobos haha, but its not desinged for bike clutches like in your forman. stick with T4 castrol, or hondas brand.
 

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SENTHETIC IS NOT FOR WET CLUTCHES! it is great for Cars, trucks, van, and hobos haha, but its not desinged for bike clutches like in your forman. stick with T4 castrol, or hondas brand.
There are several good synthetic oils made for us in motorcycles and ATV's with wet clutches. I have been using Amsoil's 10W-40 for several years in my Goldwing, my 450R and my 400EX.
 

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here is my theory,,,save the money you spend on a 10 dollar a quart oil and buy top grade mineral oil for 3 bucks and change your oil 3 times more often. The best synthetic oil in the world will not stop a foreign object floating around your motor from doing damage,,,,
 

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finally asked my honda mechanic today..his 20 something years as a honda mechanic has never told me wrong..his advice..DO NOT USE ANY OIL THAT HAS MOLY IN IT..it is not made for wet clutches..he told me i could run just about any oil in my atv..as long as it don't contain moly in it..sooo...now i know !..i've never had a clutch slipping..but..i wont risk it on this 89 trx350d fresh rebuild..i will go all out..and give her the amsoil 10w-30..then when it get's to be summer around here..i'll switch to 10w-40. so..now i know alot more about wet clutches and oil additives..hope ya'll know more now too.
 

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i just put in an order for AMSOIL...
 
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