Five Costly LPG Installation Mistakes to Avoid

Switching to autogas cuts fuel bills, but only if the conversion fits the car and follows Estonian rules. At GBO Eesti we see three main factors that decide long‑term savings: the kit price, the registration fee, and ongoing service. Ignoring any of them turns a cheap upfront offer into a costly headache.

Matching kit to cylinder count and budget

For a 3‑4 cylinder car the Econom kit costs 900 €, the Standart 1 200 € and the Premium 1 600 €. A 5‑6 cylinder vehicle needs a Standart at 1 300 € or a Premium at 1 650 €. An 8‑cylinder engine requires a Standart of 1 600 € or a Premium of 1 900 €. The Econom version omits some calibration maps, which can leave the mixture too rich or too lean after a few weeks of driving. Each hour of diagnostics or repair is charged at 40 €, so a single adjustment visit can wipe out weeks of fuel savings. Choosing the Standart or Premium adds the brand‑specific maps from Alex, AC Stag, Lovato, Landi Renzo, Digitronic or Tomasetto, keeping the engine within the manufacturer’s lambda target and preserving the 35‑45 % fuel‑cost advantage.

Registration is mandatory, not optional

Since 2023 the Transport Administration requires an ARK entry for every LPG conversion, price starting at 120 €. Skipping this step makes the vehicle illegal, leads to fines, and guarantees a failed technical inspection. Insurance companies treat an unregistered system as a modification without approval, so any accident claim can be denied, leaving the owner liable for damages that far exceed the 120 € fee. The installer must provide the full set of documents (invoice, conformity certificate, wiring diagram) for the registration process; without them the ARK cannot be completed and the car cannot be driven on public roads.

Maintenance keeps the saving real

LPG burns cleaner but is about 10‑15 % less dense than petrol, so volume consumption rises slightly. To keep the 35‑45 % fuel‑cost advantage the system needs regular filter changes and pressure checks. Both diagnostics and labour are charged at 40 € per hour; a typical service takes one hour, so expect roughly 40 € every 15 000 km or once a year, whichever comes first. Neglecting this service lets deposits build in the injectors, raising consumption and cancelling the volume‑based penalty, while also wearing out valves faster. A well‑maintained kit holds its payback period of 10‑18 months; a neglected one can stretch to two years or more.

Matching generation to engine type

The most common fourth‑generation kits use sequential injection and suit the majority of port‑injected engines. Modern direct‑injection turbo units (GDI, TSI, FSI) need a sixth‑generation liquid‑phase kit, which keeps fuel in liquid form until the injector. Fitting a fourth‑gen kit on a GDI engine causes misfires, warning lights and can damage pistons over time. Conversely, installing a sixth‑gen kit on an older port‑injected car works but is unnecessary expense; the extra cost buys no extra benefit. For an 8‑cylinder engine the Standart price is 1 600 € and the Premium 1 900 €; the Premium adds finer mapping and brands such as Lovato or Landi Renzo, ensuring the liquid‑phase system stays within safe pressure limits.

Next steps

Visit our workshop at Magasini tn 31b, 10138 Tallinn to see the component brands in person, or check the detailed price table at /en/prices/. Use the online calculator at /en/#calc to estimate your personal payback based on annual mileage, or call +372 5619 8765 to book a free suitability check. You can also read about our service approach at /en/services/. A certified turnkey installation guarantees the safety levels, shut‑off valve and multivalve required from the fourth generation onward, letting you enjoy the 35‑45 % fuel saving without surprise bills.