ONR on sale right now - how far does a bottle actually go for you?

I run a small fleet of trucks for landscaping, so my usage is way higher than a typical suburban homeowner. I wouldn't bet on getting a massive amount of washes out of one bottle, but I defintely don't want to waste money pouring too much on. My personal ratio is pretty light, maybe using about three ounces of the concentrate mixed into five gallons of water for a full washdown. I'm not aiming for that deep, waxed look you get from premium sealants, just effective dirt removal. I usually go through a standard gallon size every couple of weeks during heavy use season, assuming I'm keeping the dilution light like that. For a single bottle, which is usually a quart size, I'd say I could squeeze out maybe four or five serious truck wash cycles before it's totally depleted. The older formulation versus the newest stuff isn't a huge deal for me, honestly. Both do the job of cutting through caked-on mud and grime just fine, and the differences are mostly performance hype from the marketing teams. If you're just doing weekend detailing on a couple of vehicles, stick to your gut and grab the second bottle if you feel like it. If you're only washing cars once a month, you are probaly fine with one bottle. But if you're doing anything regular, buying two when the sale is running is just smart stocking up for the rest of the year.

I kind of went the other direction on dilution after ruining a couple of washes with a too-thin mix. My daily driver sits outside under a carport and gets dusty but not filthy, and I found that when I stretched it too far I'd get light marring from the dirt not staying suspended. So I run mine fairly rich compared to what most people suggest, maybe a couple capfuls per gallon in a small sprayer, and I do a quick pre-spray of the whole car before anything touches the paint with a mitt. That pre-spray step made the bigger difference for me than the ratio did. Letting it sit a minute on the panels, then using a plush microfiber mitt with hardly any pressure, and I barely get swirls anymore even on my black hood. I keep a second spray bottle mixed at closer to quick detailer strength for bird droppings and door jams between full washes, and that bottle probably uses up more concentrate than the wash bucket does. On washes per bottle, I stopped counting honestly. My bottle has lasted close to two years of maybe twice a month washing on two cars, and it's still half full. I'd say buy the second one while it's cheap, it doesn't go bad sitting on a shelf, and winter road grime season is when I use the most.

Haven't used the older version so I can't compare, but the current one cleans fine for my purposes.

I keep a little notebook with my wash dates and how much concentrate I poured, which probably says more about me than I'd like, but it settled the math for good. I mix one ounce into two gallons like the label suggests, and a gallon jug lasted me from last spring untill about a month ago, washing two cars roughly every other week. One thing I'd add on the dilution question is that the stuff pulls double duty, since I run a much stronger mix in a little sprayer for the interior and for spot cleaning bird droppings, so some of my bottle never touches a bucket at all. Worth factoring that in before you decide on a second bottle.

Mobile detailer here, and the bottle math is one of the reasons I stuck with this stuff. I mix one ounce per two gallons like the label says, and my last gallon jug covered right around 300 washes before it ran dry. Even dirty daily drivers came out clean as long as I presoaked the lower panels with a sprayer before touching them with a mitt. On the sale question, this stuff keeps fine for years, so an extra bottle just sits there costing you nothing. The only time I go richer is on a car caked in road film, and even then a proper presoak does more than extra product in the bucket.

Funny timing reading this because I grabbed some during the same sale, though my situation is a bit different since I mainly ride motorcycles, not cars. I've been experimenting with putting a weaker mix in a spray bottle for the dusty in-between days instead of doing a full bucket wash every time. Seems to work okay on light dust but I honestly don't know if I'm just smearing things around on anything dirtier. Is that a legit way to use it or am I better off saving the spray stuff for glass and quick wipe downs? Still figuring out what all this stuff can do honestly.