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79 Suzuki gs550 recommended oil

  • Thread starter Thread starter danbobberino
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danbobberino

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I have a 79 Suzuki gs550 and am from Canada. Can anyone recommend an oil to run in the motorcycle? The bike says it wants 10W-40 and it doesn't get overly hot here in the summer - usually between 20-30 Celsius (70 to 85 Fahrenheit) with falling more in the lower range of that. I've read about oil having a high zinc content. Any Canadians have an oil they love running? And where to purchase it? For what it's worth I currently have Castrol GTX in it.
 
I run Shell Rotella diesel oil in my motorcycles now. Not the synthetic stuff! I use to run Castol GTX in all my engines years ago, but I think it was because I was a John Force fan. ��
 
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yes any modern oil will more than meet the spec your bike wanted when new
I use rotella something somethin cheap at walmart and works fine
so cheap I can drain it at will

as for it not getting very warm its not that it rarely does its that it might one day on a long haul
 
I wouldn't run GTX. That stuff, like all auto oils, have drastically reduced ZDDP compared to back in the day. Get Shell Rotella instead. It's 15W-40 but GS bikes love the stuff.
 
Seems everyone is a fan of the Shell Rotella. I'll check it out!
 
I have seen Rotella 10W-40 on Amazon. Seems more expensive than the 15W-40. Not sure if the content is different other than tbe weight.
 
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