Na tej stacji benzyna jest tańsza.

to be

Breakdown of Na tej stacji benzyna jest tańsza.

• na: at
• ta: this
• tańszy: cheaper

Questions & Answers about Na tej stacji benzyna jest tańsza.

Why is it na tej stacji and not w tej stacji?

Because Polish uses certain prepositions idiomatically with certain places, and station is one of the nouns that normally goes with na when you mean being at that location.

So:

• na stacji = at the station / at the gas station
• not usually w stacji in this meaning

This is similar to how English says at the station, not necessarily something more literal like in the station in every context.

A useful contrast:

• na tej stacji = at this station
• na tę stację = to this station

So here na is the normal choice for location.

Why does it say tej stacji instead of ta stacja?

Because after na when it means location, Polish uses the locative case.

The basic forms are:

• ta stacja = this station

But after na in a location phrase, they change to:

• na tej stacji = at this station

So both words change:

• ta → tej
• stacja → stacji

This is a very common pattern in Polish:

• na tej ulicy = on this street
• w tej szkole = in this school
• o tej książce = about this book