Two really dumb oil questions...

[XLFREAK]

How far under the "full" line do you run it?
Can you add Dino Juice to synthetic to top off?

[gusotto]

You DON'T mix dino and synthetic.
Buy an extra qt. and either carry it or check your oil levels before leaving.

[XLXR]

I have 1300 miles on 06 1200 R. I run the oil level about 3/4 full on stick. I switched to Amsoil 20w-50 at 1000 miles. There seems to be less oil vapor inside the stock filter housing. I say vapor because I never had a leak like some guys do. But not enough miles to say for sure.

Mixing oils in an emergency to get home, is better than running too low for too long. If the oils have a similiar API service rating, viscosity, base stock, additive package, and same service applications you're probably safe. However, don't mix 2 stroke and 4 stroke oils, different viscosity, wet vs dry clutch, or transmission vs engine ratings. But the oil companies generally don't tell you base stock or additive packages. So mix at you own risk, but change it as soon as possible. Mixing will get you home, it is just almost impossible to tell what the long term effects will be. Guys in the oil business tell me they may still have a car come in with goo in the crankcase, its rare, but still happens.

If you want to assume synthetic oils are better than dino's, adding dino will only degrade the synthetic oil to some extent. I don't what other synthetic producers say, but Amsoil says it is OK to add dino oil, if that is your only choice at the time, but it is your guess as to when to change it again.

Be careful about adding after market additives. Stick to the ones that have been around a long time. The may help dino oils, but generally should not be used with synthetics because of they use different formulations. Amsoil does not want you to use any after market additive at all.

[XLFREAK]

No worries about me mixing oils. I dont even mix brands!

[Takingabreak]

it is always best to keep the same oil amd brand the same in your engine, but in a Pinch, mixing is better the running it low.
About 3/4 to the top of full range is best, as you will get less blow by leaking out of the air cleaner.

[sportysrock]

Mixing is ok, but the dino oil will combine with combustion by-products more readily to form acids. Synthetic oil will maintain viscosity better, and resist oxidation which leads to formation of sludge and carbon deposits.

Mixing regular dino oil with synthetics will lessen the drain interval from that of straight synthetic so I would try to top off with any available synthetic motorcycle oil before doing so.