Oster 6684 12-Speed Blender Review: Does It Crush Ice?

The Oster 6684 12-Speed Blender is a countertop blender built around one big promise: a stainless steel blade and an all-metal drive that the listing says will pulverize and chop with precision. The real question is whether the drive and blade will hold up to daily frozen drinks and ice, or whether you’ll be replacing the whole thing in a year.

Buy it if you want a blender whose selling points are the blade and the connection between motor and jar. The listing names stainless steel for the blade and an all-metal drive for a metal-to-metal connection, which tells you where Oster put the emphasis. Skip it if you’re blending for one person only, since the 6-cup glass jar is sized for a household, not a single smoothie. Consider instead a smaller personal blender if counter space is tight, or a model with a tamper and a large jar if you plan to make thick nut butters. Everything here comes from the listing; I haven’t used, held or tested this blender.

Preview
Product	Oster 6684 12-Speed Blender
Brand	Oster
The listing says	700 power watts, 450 blending watts Crush Pro 4 Blade in stainless steel, 4-point design
More information	Check Latest Price on Amazon

Does the All-Metal Drive and Crush Pro Blade Actually Matter?

This is the attribute that decides the purchase, and the listing is unusually specific about it. The Crush Pro 4 Blade uses stainless steel in a 4-point design, and Oster says it will pulverize and chop with precision. The All Metal Drive, in the manufacturer’s wording, is extra durable for a metal-to-metal connection. Read those two lines together and you see the pitch: the parts that take the most punishment — the blade and the collar where the jar meets the motor base — are the parts Oster chose to build from metal rather than plastic.

What that means in real use is simple. Ice, frozen fruit and fibrous vegetables are what kill blenders, because they put torque through the blade and the drive at the same time. A metal-to-metal connection is the manufacturer’s answer to that stress point. If you make frozen drinks, crush ice for cocktails, or blend leafy greens often, that’s the spec aimed at you. It’s also the reason this blender suits someone who wants one appliance to do several jobs rather than a single-purpose smoothie maker.

Where it falls short: the listing describes the blade and the drive but says nothing about the motor housing, the base material or the jar collar beyond the glass jar itself. So the durability claim is specific to two components, not the whole machine. The 700 power watts and 450 blending watts are the listed figures — note that Oster gives two, and the lower one is what’s doing the work in the jar.

Who Gets the Most Out of This Blender?

Three kinds of buyers fit this machine well. First, the household that makes frozen drinks or crushes ice regularly — the stainless steel 4-point blade and the all-metal drive are the two features the listing leans on hardest, and both are aimed at that job. Second, someone who wants one blender to cover several tasks rather than a shelf of single-purpose gadgets, because the 12 speeds run from PULSE to PUREE, which spans chunky salsa through to smooth soup textures. Third, anyone who hates hand-washing: the 6-cup Boroclass glass jar is dishwasher safe, which the listing states plainly.

It’s also a reasonable fit for a kitchen where more than one person blends, since the jar holds enough for a family round of smoothies rather than a single serving.

The buyer it doesn’t suit is the one with a cramped counter and no cabinet clearance. This is a full-size countertop blender with a glass jar, and glass has real presence — it doesn’t squash down or flex the way a personal blender cup does. If you blend one small smoothie a day and put the machine away afterward, a compact personal blender will take up less room and ask less of you. If you need to store it upright under a low shelf, measure your clearance before ordering, because the listing doesn’t give a height figure.

What the Listing Actually Specs Out

Here’s the full set of details Oster states for this blender, gathered in one place so you can check them against what you need.

Is 6 Cups the Right Size for You?

The jar’s capacity is the spec to think hardest about, because it decides how many people you’re blending for. That capacity is a family quantity, not a single serving. One round fills several glasses, which is what you want if you’re making smoothies for a household or batch-blending a sauce you’ll use across a couple of meals. It’s also the size that makes a full jar of frozen drink for guests realistic rather than a stretch.

For one person drinking a single smoothie a day, the jar is more than you’ll fill. That’s not a fault, but it does mean you’ll be washing a larger jar than the job requires, and you’ll have more glass sitting on your counter. If you routinely blend small quantities — a single dressing, a baby’s portion — a smaller jar would ask less of you.

The listing doesn’t state the jar’s height or the assembled height of the blender, so if you’re working around a cabinet overhang or a shelf, measure your clearance and check the dimensions on the product page before ordering. It also doesn’t say whether the jar is marked with measurement lines on the side, though the 2-ounce filler cap does have built-in markings for measuring and pouring while you blend — that’s the measuring feature the listing actually names.

Twelve Speeds, One Dial: Easy or Fiddly?

The control scheme is a 12-speed dial running from PULSE at one end to PUREE at the other, according to the listing. That’s a continuous range rather than a set of preset buttons, and it’s the kind of control most people figure out in a minute or two: turn it partway for coarse chopping, turn it further for a finer blend, hold it at PULSE for short bursts. If you’ve used a blender with a dial before, there’s nothing new to learn here.

The advantage of a range over presets is that you’re not hunting for the right button — you can nudge the speed up or down mid-blend as the mixture changes. That suits someone who cooks by feel and adjusts as they go. The advantage of presets, which this doesn’t have, is that you don’t have to think at all: press ICE CRUSH and walk away.

Where it gets fiddly is thick mixtures. You’d stop, scrape down, and restart — normal blender behavior, but worth knowing if you plan to make nut butter or very thick dips. For thin and medium mixtures, the dial is straightforward. The 2-ounce filler cap also lets you add liquid mid-blend without pulling the lid, which is a small convenience that saves a stop-start cycle.

Cleaning This Blender: What You’re Signing Up For

The listing makes the cleanup story easy to state: the Boroclass glass jar is dishwasher safe. That’s the one recurring chore, and Oster has removed most of the friction from it — you rinse, load the jar, and let the dishwasher do the rest. Glass also means the jar is the dishwasher-safe part the listing names.

The blade assembly is the part to think about.

Beyond the jar and blade, there’s nothing to refill, charge or replace on a schedule. No filters, no pods, no batteries. The 2-ounce filler cap is a small part that lives on the lid, and small lids and caps are the things that go missing in a kitchen drawer. The ongoing commitment here is washing the jar, plus wiping the base — that’s it, and the dishwasher handles the bigger half of it.

Build Quality: Metal Where It Counts, Glass Up Front

Two materials carry this blender’s build story, and both come straight from the listing. The Crush Pro 4 Blade is stainless steel, and the All Metal Drive is described as extra durable for a metal-to-metal connection. That’s Oster telling you the load-bearing parts — the cutting edge and the joint between jar and motor — are metal. It’s the reason this machine’s durability claim is specific to the blade and the drive.

The third material is the jar: 6-cup Boroclass glass, dishwasher safe. Glass is the heavier, more inert choice for a blender pitcher, and it’s the reason this machine has some heft to it. The listing doesn’t state the blender’s weight, so if you need to know how much you’re lifting onto the counter or how much shelf a glass jar will take, check the dimensions and weight on the product page.

The honest trade-off the listing supports: the durability language covers the blade and the drive, not the whole machine. So the metal story is real but partial — you’re buying a blender with a well-specified blade and drive, not a blanket promise about every part.

How Long Will This Blender Keep Working?

The parts most likely to give out first are the ones the listing has already addressed: the blade and the drive. Oster’s answer is stainless steel for the Crush Pro 4 Blade and an all-metal, metal-to-metal drive connection. They’re the two components this machine specifies as metal. That’s a durability signal in the listing, and it’s the reason the machine is worth considering for heavy ice and frozen-fruit use rather than light blending only.

What wears next is everything the listing doesn’t name. If spare parts availability matters to you, that’s a question for the seller.

Upkeep changes the picture in one direction: keeping the blade clean and not overloading the jar are the two things within your control, and both extend how long the drive and blade stay effective. Nothing here dates the way a battery-powered device does — there’s no software, no app, no consumable. The clock on this blender is mechanical, and the listing has told you which mechanical parts it built from metal.

From Box to First Blend: What Setup Looks Like

Setup for a blender is short, and this one is no exception. You unpack the base, the glass jar, the lid and the filler cap, then wash the jar, lid and cap before first use — glass and lids ship with packing residue, and the jar is dishwasher safe so that step is easy. The base itself just needs a wipe and a spot on the counter near an outlet.

There’s no assembly to speak of: the jar seats on the base, the lid goes on the jar, the filler cap goes in the lid. There’s no pairing, no app, no registration step mentioned in the listing, and no charging — this is a corded appliance, so it’s ready as soon as it’s plugged in. The 12-speed dial runs from PULSE to PUREE, and the fastest way to learn it is to start at a low setting with something soft, then work up.

How much of this the listing documents is limited. Oster states the features and the jar’s dishwasher safety, but the listing doesn’t include a step-by-step first-use guide, so if you want specific guidance on which speed suits which job, you’ll be working it out yourself or checking the manual that comes in the box.

How This Blender Compares to Your Other Options

Set this next to a simpler blender and the difference is in the parts you can’t see from across the kitchen. What a simpler machine gives up, then, is the durability claim on the load-bearing parts, plus the 12-speed range; many basic blenders offer a handful of buttons instead of a continuous dial from PULSE to PUREE.

Step up to a more elaborate machine and you’re adding features this listing doesn’t claim: preset programs, a tamper for thick mixtures, sometimes a second smaller jar for single servings. Those help with specific jobs — nut butters, small batches, one-touch ice crushing — and if those jobs are your main use, the extra capability is worth having. This blender’s strength is narrower but solid: a metal blade, a metal drive, a glass jar, and a wide speed range.

The honest case for buying nothing: if you already own a blender that works, or you blend so rarely that a whisk and a knife handle the job, there’s no reason to add a second machine to the counter. A blender earns its space through frequency of use. If you’d use it a few times a month for frozen drinks or soups, the metal blade and drive are the reason to pick this one over a basic model. If you’d use it twice a year, keep what you have.

Pros and Cons of the Oster 6684 12-Speed Blender

Pros

• All Metal Drive gives a metal-to-metal connection, per the listing
• Crush Pro 4 Blade is stainless steel with a 4-point design
• 12 speeds run from PULSE through to PUREE
• 6-cup Boroclass glass jar is dishwasher safe
• 2-ounce filler cap has built-in measuring markings
• Rated at 700 power watts and 450 blending watts

Cons

• No stated guarantee length anywhere in the listing
• No tamper mentioned for thick, stalled mixtures

What the Listing Leaves You to Confirm

Before you order, put these questions to Oster’s own product page or to the seller, because the listing doesn’t settle them and the answers change whether this blender fits your kitchen.

What are the assembled height and the weight? The listing gives the jar capacity but no dimensions, and a full-size blender with a glass jar needs cabinet clearance. Measure the space above your counter and compare before ordering.

How long is the guarantee, and what does it cover? No warranty length appears in the listing. Since the durability pitch is specific to the blade and the drive, it’s worth knowing whether the motor and base are covered too, and for how long.

Are replacement jars, lids and blades sold separately? The listing doesn’t say. If you plan to keep this machine for years, spare-part availability decides whether a chipped jar means a new jar or a new blender.

Is the blade assembly removable, and is it dishwasher safe? The listing states the glass jar is dishwasher safe but says nothing about the blade collar. Ask, because that’s the part you’ll be cleaning most often.

Frequently Asked Questions

Can the Oster 6684 crush ice and frozen fruit?

Yes — that’s the job its two headline features are built for. The listing describes the Crush Pro 4 Blade as stainless steel with a 4-point design that will pulverize and chop with precision, and the All Metal Drive as a metal-to-metal connection. Ice and frozen fruit are exactly the loads those parts are specified to handle. For best results, add liquid and use short PULSE bursts.

What do I have to replace to keep using it?

Nothing on a schedule. There are no filters, pods or batteries, and the jar is dishwasher safe, so upkeep is washing rather than replacing. The listing doesn’t state whether replacement jars, lids or blades are sold separately, so if long-term spare-part availability matters to you, confirm that with the seller before ordering.

How much does the 6-cup jar actually hold?

Six cups, as listed — enough for several glasses at once rather than a single serving. That suits a household making smoothies or frozen drinks in one round, and it’s more than one person needs for a daily single smoothie. The 2-ounce filler cap also carries built-in markings, so you can measure and pour ingredients while the blender runs.

What comes in the box?

The listing names the blender, the 6-cup Boroclass glass jar, and the 2-ounce filler cap with built-in markings. It doesn’t itemize the full contents, so if you need to know exactly what ships — lid style, manual, any accessories — check the product page or ask the seller before ordering.

Is a 12-speed dial hard to use?

No. It’s a continuous range from PULSE to PUREE, which most people get the hang of in a minute or two — turn it partway for coarse chopping, further for a finer blend. It suits cooks who adjust speed by feel mid-blend.

Is a blender like this worth owning at all?

It depends on how often you’d use it. If you make frozen drinks, soups or sauces regularly, the stainless steel blade, all-metal drive and dishwasher-safe glass jar are the features that justify the counter space. If you blend a few times a year, a whisk and a knife cover most jobs and you’d be storing a full-size machine for occasional use.

The Verdict: Buy the Oster 6684 If Metal Parts Matter to You

For the household that blends often and blends hard — frozen drinks, crushed ice, thick soups — this is a straightforward yes. Oster has put its specification where blenders usually fail, naming a stainless steel 4-point blade and an all-metal, metal-to-metal drive, and pairing them with a dishwasher-safe glass jar and a wide speed range. If your last blender died at the blade or the drive coupling, this is the machine built to answer that.

For the small-kitchen, single-smoothie buyer, it’s a softer call. A full-size blender with a 6-cup glass jar takes counter space and cabinet clearance, and the listing gives no height or weight figure to plan around. A compact personal blender will fit your routine better, even though it won’t carry the same metal blade and drive specification.

For the occasional user who blends a handful of times a year, buy nothing. Keep what you own or use a whisk. A blender earns its place through frequency, and this one’s case rests on durable parts being used often enough to matter. If you’re in the first group, the metal blade and drive are the reason to choose it over a basic model.