Mixed Brands

[railball]

I put a bunch of single quarts in one 5 qt. bottle.They are NAPA 15/50 1qt. Syntec Blend Truck 15w40 1qt. Syntec 5/50 1 qt. SyntecGC 0/30 1qt. 1/2 qt Castrol Startup 10/30 1/2 qt. AMSOIL 10w40. What Weight oil am I looking at and can it be used in a car or should I use it in the lawn equiptment.

 

[pitzel]

I'd suspect in the SAE 40 range.

http://www.shellglobalsolutions.com/base_oils/toolbox/toolbox.htm

If you know the 40degC and 100degC viscosities of all of the oils you have mixed, you can do the calculation yourself.

 

[Al]

Probably somewhere in the 40 wt. You could use it. But with all that transferring around of the oil you might have contaminated it with dirt. I personally wouldn't use it.