Aquest tipus de lubricant funciona bé.

Because aquest has to agree with tipus, and tipus is a masculine singular noun.

• aquest = masculine singular
• aquesta = feminine singular
• aquests = masculine plural
• aquestes = feminine plural

So:

• aquest tipus = this type
• aquesta classe = this class/kind

Even though lubricant is also masculine, the demonstrative is agreeing with tipus, not with lubricant.

It literally means type of lubricant.

The structure is:

• tipus = type
• de = of
• lubricant = lubricant

So Aquest tipus de lubricant is literally This type of lubricant.

This is a very common Catalan pattern:

• un tipus de problema = a type of problem
• una mena de soroll = a kind of noise
• una classe de material = a class/type of material

Because here lubricant is being used in a general, category-like way, not to refer to one specific lubricant.

• tipus de lubricant = type of lubricant / kind of lubricant
• tipus del lubricant would suggest of the lubricant, referring to a specific lubricant already known in context
• tipus d’un lubricant would mean type of a lubricant, which is less natural here unless the context really requires it

In Catalan, after nouns like tipus, mena, classe, it is very common to use de + noun with no article when speaking generally.

Here it is singular, because the sentence says aquest tipus and the verb is funciona (singular).

A useful thing to know is that tipus is one of those nouns that often looks the same in singular and plural:

• aquest tipus = this type
• aquests tipus = these types

So the form tipus itself does not change, but the words around it tell you whether it is singular or plural.

Because funcionar is the normal verb for to work / to function when talking about how something performs.

So:

• funciona bé = works well / functions well

Compare:

• és bo = it is good
• treballa bé = he/she works well

For machines, products, systems, methods, and similar things, funcionar is very common:

• Aquest motor funciona bé. = This engine works well.
• El sistema no funciona. = The system doesn’t work.

Bé means well here. It is an adverb modifying funciona.

So:

• funciona bé = works well

The accent is important because bé is a distinct word with its own spelling and pronunciation.

You will often see bé in expressions like:

• està bé = it is fine / it is okay
• parla bé = he/she speaks well
• molt bé = very well

Usually, no. In this sentence, bé is the correct form.

A useful guideline is:

• bé is usually used on its own as well
• ben is often used before an adjective, adverb, or participle

Examples:

• funciona bé = works well
• ben fet = well done
• ben clar = very clear / quite clear
• ben aviat = very soon

So Aquest tipus de lubricant funciona bé is the natural wording.

Because in Catalan, as in English, a demonstrative like aquest already determines the noun.

So you say:

• aquest tipus = this type

not:

• el aquest tipus

This is the same idea as in English: you say this type, not the this type.

The word order is very straightforward:

• Aquest tipus de lubricant = subject
• funciona = verb
• bé = adverb

So the pattern is:

Subject + Verb + Adverb

This is one of the most common and neutral word orders in Catalan.

A simple approximate pronunciation for an English speaker is:

ah-KEST TEE-poos duh loo-bree-KANT foon-see-OH-nuh BAY

A few notes:

• aquest: the final -st is pronounced
• tipus: the i is like ee
• lubricant: stress falls on the last syllable, -cant
• funciona: stress is on o
• bé sounds roughly like bay

In Central Catalan, unstressed vowels are often reduced, so native pronunciation may sound a bit more like:

uh-KEST TEE-poos duh loo-bree-KANT foon-see-OH-nuh BAY

Yes. Like lubricant in English, lubricant in Catalan can be used generically or specifically.

In this sentence it is generic:

• Aquest tipus de lubricant = This type of lubricant

It refers to a category, not to one specific container or brand.

If you wanted to make it more specific, the context or an article could do that:

• el lubricant = the lubricant
• aquest lubricant = this lubricant

But in tipus de lubricant, the generic meaning is the natural one.

Sometimes yes, but the nuance is a little different.

• funciona bé = works/functions well
• va bé = goes well / works fine / is suitable

For a product or mechanism, funciona bé is very clear and direct.
Va bé is also extremely common in Catalan, but it can be a bit broader and more context-dependent.

For example:

• Aquest tipus de lubricant va bé per a motors antics. = This type of lubricant works well for old engines.
• Aquest tipus de lubricant funciona bé. = This type of lubricant functions well.

So in your sentence, funciona bé is perfectly natural and precise.

It is neutral and completely natural in standard Catalan.

It would work well in:

• conversation
• technical explanation
• product description
• written instructions

Nothing in the sentence is especially formal or especially casual. It is a plain, standard way to say it.