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daiglea
10-11-2002, 04:53 AM
I am looking into changing my oil to synthetic. Did anyone have any bad experiences with synthethic in theire 400. I have a 2001 400ex with no mods yet.
10-11-2002, 06:08 AM
I've run 100% synthetic for well over a year with no problems at all...and I run the 416 very very hard...:macho
oynot400
10-11-2002, 06:10 AM
All I have ran is synthetic, over 2 1/2 years no problems. :D
daiglea
10-11-2002, 06:19 AM
Is there any kind in specifique like 10w40 full synthetic or something??
10-11-2002, 06:21 AM
Well I'll go ahead and give ya the bad news...good synthetic oil is gonna run about $7 ta $8 a quart. I run maxima 15w-50 but have also run mobil 1 V-twin motorcycle oil 20w-50 and you can pick that stuff up at wallyworld too..:D
daiglea
10-11-2002, 06:23 AM
wouldn't 15w50 be a bit thick come winter. In summer i can understand but in winter is realy thick.
daiglea
10-11-2002, 07:55 AM
The reason i'm asking is i bought a 400ex from a repot guy and i don't know what the guy was putting in it. For some reason since i changed it's oil it started burning it.. I figure he was running a synthetic oil and wen i changed it to regular it did not like it. I thought i'd change it to synthetic and see what it does.:devil
oynot400
10-11-2002, 08:14 AM
I am using Golden Sprectrol 20w-50 in the summer and 10w-40 in the winter. I have used Castrol before but I notice my clutch slip more with it. I have Mobile 1 in right now and it seems to be working alright.
Try the synthetic and see if it helps with the smoking problems. If not then it could be one of 2 things, the vavle seals are leaking or it is leaking by the rings. If that is the case it would be a good time to make it a 416. :D
daiglea
10-11-2002, 11:56 AM
wouldn't changing oil vicosity effect the engine in a bad way??
oynot400
10-11-2002, 12:58 PM
Originally posted by daiglea
wouldn't changing oil vicosity effect the engine in a bad way??

yes and no, If you look in your owners manual it gives a list of oil weights and temp ranges. If you stay in that range you will be fine. However lets say it is summer time and you normally put in 20w-50 and you put in straight 10w. Then you will have a problem.
phatswinn
10-11-2002, 02:48 PM
i run 10w-40 all year
400exdad
10-11-2002, 08:08 PM
This is going back some time ago, way back when synthetics first came out. From what I read, if you had a motor with some miles on it and switched to synthetic, it was more likely to start burning oil than if you switched from a synthetic to regular. I could be wrong.....:o