Originally Posted By: BluesRider
Originally Posted By: BigCahuna
Sunruh, is it because you had a bad experience with GTX, that your don't recommend it? Alot of people use that oil and I haven't seen any posts about motor damage by anyone that uses it. I used it 30+ years ago in my bikes and never had an issue.,,
You've been lucky.Or,you don't do a lot of city miles,or canyon carving.I'll bet you do most of your riding on the open road,right? Plus,it's not really the motor you should worry about.Highway miles are pretty easy on the clutch and trans,and the clutch and trans are where modern car oils will actually damage your machine.
GTX is not m/c oil. In fact,it ain't the same stuff it was a few years ago.They've had to take a lot of the good stuff out of it to make it pass the API certs,and not ruin the cat converters.On the newer oils,I think,SJ on up,they've put in "fuel economy enhancers" that will make your clutch slip.Also car oil doesn't have the EP properties to protect the transmission.
That goes for any MODERN car oil,not just GTX. Hey,if you've got a 40 year old quart of GTX,or Quaker State,or whatever car oil laying around,go ahead and pour it in.Not the best oil,for sure,but it won't actually hurt anything.
If you are running it in an H-D or some other bike that runs separate trans/engine oil,you can get away with it for a while,but seriously,why? I've never understood some of my clients resistance to parting with 50 bucks to fill the crankcase on their 30 thousand dollar motorcycle. If you insist on using cheap oil,at least use Rotella,or Delvac,or Delo,or something like that.You can find sales on it for 12-13 bucks all the time,and while it's not motorcycle oil,it's a lot better than car oil for your bike.
Can you provide any PROOF of damage that has occurred, or that spending $50 for oil makes your motor last any longer then using car oil in a Harley? .,,