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91shelbyt · 08-18-2009, 08:07 PM

Hi there, i was wondering, if id be able to run synthetic in an 1980 CB750F or would it mess with the clutch?

thanks

The_AirHawk · 08-19-2009, 03:00 AM

Avoid oils that contain "Energy Conserving" additives. On a bike that old, you may see seal-leakage due to the high detergent action of the synthetics as it washes the crud away left behind by the conventional oil.

seruzawa · 08-19-2009, 05:16 AM

The engine seals in older vehicles are not designed for synthetic oils. Stick with petroleum oils.

sarnali2 · 08-19-2009, 07:01 AM

use 15w40 Shell Rotella T, best conventional oil you can find. As high a flash point as most synthetic and cheap too!

mscuddy · 08-19-2009, 08:14 AM

Ditto on the 15/40 Dello diesel truck oil, it's high in zinc for cushioning those gears, and it's good for the bikes prostate too.

08-18-2009, 08:07 PM	#1
91shelbyt Registered Member Join Date: Aug 2009 Posts: 1	1980 CB750 F and synthetic oil Hi there, i was wondering, if id be able to run synthetic in an 1980 CB750F or would it mess with the clutch? thanks

08-19-2009, 03:00 AM	#2
The_AirHawk Founding Member Join Date: Jun 2007 Location: Livin' in a Van: down by the Mariana Trench Posts: 10,891	Avoid oils that contain "Energy Conserving" additives. On a bike that old, you may see seal-leakage due to the high detergent action of the synthetics as it washes the crud away left behind by the conventional oil. __________________ *Parfois, on fait pas semblant* Sometimes, it's not pretend Oderint Dum Metuant Let them hate so long as they fear политики предпочитают безоружных крестьян Politicians Prefer Unarmed Peasants Nothing to see here, Citizen. Move along now...

08-19-2009, 05:16 AM	#3
seruzawa Robby Join Date: Nov 2001 Location: 8501 ft. Posts: 16,803	The engine seals in older vehicles are not designed for synthetic oils. Stick with petroleum oils. __________________ I've seen things you people wouldn't believe. Attack ships on fire off the shoulder of Orion. I watched c-beams glitter in the dark near the Tanhauser Gate. All those moments will be lost in time, like tears in the rain.

08-19-2009, 07:01 AM	#4
sarnali2 Aging Cafe` Racer Join Date: Jun 2007 Location: Sittin' down by my window, lookin' at the rain. Posts: 8,132	use 15w40 Shell Rotella T, best conventional oil you can find. As high a flash point as most synthetic and cheap too! __________________ "Carpe` Throttelum -Loud Suits Save Lives" "All the BMW riders in the room, I want you to leave. Now. Out. "

08-19-2009, 08:14 AM	#5
mscuddy MODERATOR X Join Date: Jun 2007 Location: Next to my still checkin the temp. Posts: 5,444	Ditto on the 15/40 Dello diesel truck oil, it's high in zinc for cushioning those gears, and it's good for the bikes prostate too. __________________ A gun is a tool, Marian; no better or no worse than any other tool: an axe, a shovel or anything. A gun is as good or as bad as the man using it. Remember that.

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