Oil Recommendation

What oil would you recommend for a 1980 Honda CB900 Custom?
Thanks!

 

the oil recommendation should be in owners manual if you have it, not 100% but i think it calls for valvoline, and the weight depends on geographic location, cold = thinner, warm = thicker

 

The engine is a straight 4 900cc, so most likely 10W30 or 10W40.

 

I recommend Lucas 10-40 semi or full synthetic. if you make the switch to synthetic, don't go back to conventional. Currently I run the semi synthetic in my CB900 C but I'm thinking about going to full since the pirce has just been reduced.

 

dont waste your money on a synthetic, its a honda built in the 80s. conventional will serve the purpose just as good as half or full synthetic at half the cost. a 10-40 or 10-30 is usually the norm

 

I have an 82 cm450e that I turned into a sort of scrambler style bike with nobby tires and tube rear frame with a flat dirtbike style seat. it has 18k on it and runs great, when i got it i put what autozone had on the shelf in it..castrol motrorcycle oil. the bike had tons of valve/rocker noise, shifted like crap and the clutch slipped like crazy. I replaced the clutch and put fresh fluid in it and "Broke it in" and it still would occasionally slip on me....very frustrating. I then spent a little more money and put AMSOIIL 10w-30 motorcycle oil in it and man what a difference! no more valve/rocker noise, shifting is smoother (Easier to find neutral) and the clutch hasn't slipped since. My wife actually noticed how it was quieter after installing AMSOIL.

Synthetic oil's don't break down like conventional oil's do. They last longer and AMSOIL motorcycle synthetics are guaranteed for twice the manufacturers recommended drain intervals or one year. For most people it saves money that means one oil change a year rather than 2-3 for the same or higher cost.

 

Lol at Amsoil pimp up above me.

I'd just run 10W30 or 10W40 and call it a day. You could probably get away with running car oil too as long as it doesn't have the energy conserving mark on the bottle.

 

I'll see your "Amsoil pimp" and raise you an "Amsoil dealer".

 

Meh. Anyone can be an Amsoil dealer. I would recommend running a 0 weight oil regardless of brand (I prefer Pennzoil Platinum). Like 0w30. The oil will pass through the system a lot faster than running a 10w30 and cause no harm at all. Especially if you run the bike in cold weather. It will only help preserve your motor on startups.

 

ZeroW-Whatever oils rule, regardless of brand.

 

Motul