Το βενζινόμετρο δείχνει σχεδόν άδειο, οπότε πρέπει να βρούμε βενζινάδικο.

Βενζινόμετρο means fuel gauge.

It is a compound noun:

• βενζίνη = gasoline / petrol
• -μετρο / -όμετρο = meter, measuring device

So it literally means something like gasoline meter. In everyday use, it refers to the gauge that shows how much fuel is left.

Because βενζινόμετρο is a neuter singular noun, so it takes the neuter singular definite article το.

A few forms:

• το βενζινόμετρο = the fuel gauge
• του βενζινομέτρου = of the fuel gauge
• τα βενζινόμετρα = the fuel gauges

The ending -ο is a very common sign that a noun is neuter, though not every noun ending in -ο works exactly the same way.

Δείχνει is the 3rd person singular present form of δείχνω = to show.

So:

• δείχνω = I show
• δείχνεις = you show
• δείχνει = he/she/it shows

Here the subject is το βενζινόμετρο, which is singular, so Greek uses δείχνει = it shows.

Σχεδόν means almost.

It modifies άδειο, so:

• άδειο = empty
• σχεδόν άδειο = almost empty

In Greek, σχεδόν usually comes right before the word or phrase it modifies, just like almost in English.

Άδειο is the neuter singular form of the adjective άδειος / άδεια / άδειο = empty.

Here, learners often wonder what exactly is being described as empty. In natural Greek, this can refer to the fuel level reading, with the understood idea being something like:

• το ρεζερβουάρ = the tank
• το ντεπόζιτο = the tank

Both of those are neuter, so άδειο is natural.

So even though the sentence literally says the fuel gauge shows almost empty, the understood meaning is that the car is nearly out of fuel.

Here οπότε means so, therefore, or as a result.

In this sentence:

• Το βενζινόμετρο δείχνει σχεδόν άδειο, οπότε... means
• The fuel gauge shows almost empty, so...

Be aware that οπότε can also mean when, depending on context, but in this sentence it clearly has the meaning of so / therefore.

Πρέπει να is a very common Greek structure meaning:

• must
• have to
• need to

It is followed by a verb in the subjunctive form introduced by να.

So:

• πρέπει να βρούμε = we must / have to find

This is the normal Greek way to express obligation. Greek does not use a separate verb exactly like English must in the same way; πρέπει να + verb is the standard pattern.

Βρούμε is the aorist subjunctive form of βρίσκω = to find, used after να.

Greek often chooses:

• aorist subjunctive for a single, complete action
• present subjunctive for an ongoing, repeated, or habitual action

Here, finding a gas station is a single action, so βρούμε is the natural choice:

• πρέπει να βρούμε βενζινάδικο = we need to find a gas station

If you used βρίσκουμε here, it would not fit the grammar after πρέπει να in standard Greek.

It is built into the verb ending.

Βρούμε means we find / we should find in this structure. Greek often leaves subject pronouns out because the verb ending already shows the person and number.

So:

• βρω = I find
• βρεις = you find
• βρει = he/she/it finds
• βρούμε = we find
• βρείτε = you all find
• βρουν = they find

You could add εμείς for emphasis, but it is not necessary:

• πρέπει να βρούμε = we need to find
• εμείς πρέπει να βρούμε = we need to find

Because Greek often omits the indefinite article when the meaning is some kind of / any suitable one, especially after verbs like find.

So:

• να βρούμε βενζινάδικο = find a gas station
• να βρούμε ένα βενζινάδικο = find a gas station

Both are possible. The version without ένα sounds very natural and slightly more general. The version with ένα is also correct and may sound a little more explicit.

Yes. Βενζινάδικο is a very common everyday word for gas station / petrol station.

It is informal to neutral everyday Greek. A more formal term is:

• πρατήριο καυσίμων = fuel station

In normal conversation, most people would say βενζινάδικο.

Yes, it sounds natural and idiomatic.

A Greek speaker would readily understand:

• Το βενζινόμετρο δείχνει σχεδόν άδειο, οπότε πρέπει να βρούμε βενζινάδικο.

It has a very everyday spoken feel:

• first statement: the gauge shows we are nearly empty
• second statement: so we need to find a gas station

You could also hear small variations, such as:

• Το βενζινόμετρο είναι σχεδόν στο άδειο...
• Μας τελειώνει η βενζίνη...
• Πρέπει να βρούμε ένα βενζινάδικο...

But the original sentence is perfectly normal.