I use a Sta-Bil 1 QT bottle, it has a 'squeeze to fill' measure chamber attached... real easy to measure the number of ounces of Valvoline SynPower Diesel Injector Cleaner "Endorsed by Cummins, Inc". I use 1 oz. /8 gal. . plus a bit more.
I can add to this post. My buddy gives me his spent Redline fuel additive bottles which I use for alternately dispensing PS and Stanadyne Performance Formula. After a few uses the Redline bottle goes into meltdown! There's something in Stanadyne and PS that attacks the Redline bottle.I had a gallon of Opti-lube XPD start to leak in the garage. I transferred the product into the other Opti-lube gallon containers and the remainder into a Howes plastic jug I had emptied. 2 weeks later the Howes container had fallen over, when I tried to pick it up it was almost jelly. Opti-lube had almost dissolved the Howes container. In transferring the Opti-lube into a glass container I got quit a bit on my hands(should have had rubber gloves on) so I called Centurion for an MSDS which they quickly e-mailed but a later e-mail to them explaining the issue and asking for info on what types of containers to use and not use got no response at all. My point is be very careful with these additives especially when using non manufacturer containers. I wouldn't have any additive inside my cab period nor in the bed without being in another outside container to catch the drips and odors. This stuff dissolves stuff including I suspect bed liners, paint, you name it. I'm thinking all "plastic" containers must be rated and marked somehow. Anybody got the skinny on what's what there? tks in advance, john.