F4i - Main Forum Main F4i discussion board

Switched to conventional oil, bike now runs rough.

Old 08-31-2011, 09:05 PM
Thread Starter
Join Date: Apr 2011
Posts: 50
Default Switched to conventional oil, bike now runs rough.

So this is my second oil changed since I bought the bike about 4 months ago. I used full synthetic the first time and the bike ran real smooth. About a few days ago I changed the oil with castrol 4T and now the bike has alot more vibration. The temperature climbed to 235 today in traffic quickly. I've rode the bike all summer and the temps never went pass 230 when I ran synthetic. The bike vibrates alot more when I'm riding and while it's idling. I can feel it the most around the handle bars and my legs. Does the f4i like synthetic only?
Old 08-31-2011, 10:39 PM
gotcbr's Avatar
Senior Member
Join Date: Apr 2009
Posts: 6,494

Many here run Rotella T dino 15w40 w/ great results. Its avail at walmart & budget priced.

Old 09-01-2011, 12:45 AM
Senior Member
Join Date: Jul 2008
Location: Mesa AZ
Posts: 2,024

Has nothing to do with the oil.
Old 09-01-2011, 12:46 AM
Incognito's Avatar
Official CBRF Welcome Crew Undercover Agent
Join Date: Oct 2008
Location: Colorado, U.S.A.
Posts: 1,907

I've been running Rotella 5W-40 synthetic since about the time I joined the forum. Excellent oil, not just for bikes. At around $25 gallon, it's a win win situation.
Old 09-01-2011, 01:19 AM
Join Date: Dec 2010
Location: Bay Area, CA
Posts: 44

I've heard that it's ok to go from regular oil to synthetic but not to go from synthetic to regular oil, i think i read that on the ninja250 forum
Old 09-01-2011, 01:29 AM
Zero1080's Avatar
Senior Member
Join Date: Apr 2009
Posts: 1,185

Once you go synthetic you in theory can go back. But the more the two oils combine, the worse it is. More so if they're different weights(sp).
Related Topics
Thread Starter
Last Post
CBR 1000F "Hurricane"
08-31-2013 04:00 PM
General Tech
06-20-2013 06:18 PM
General Tech
02-10-2011 11:48 PM
09-25-2009 05:15 AM
General Tech
08-22-2008 08:10 PM

Thread Tools
Search this Thread
Quick Reply: Switched to conventional oil, bike now runs rough.

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.