Fleet News can reveal that service intervals for petrol models will be up to 20,000 miles or two years, while diesel models can extend the gap to 30,000 miles or two years.
The 'flexible' service intervals provision will apply to all new Vectras with a dashboard read-out indicating when a service will be needed.
Vauxhall fleet director Maurice Howkins said: 'We have introduced the concept to leasing companies and our other customers who are interested in wholelife costs and the reaction has been positive. We will ensure the Vectra has competitive wholelife costs.'
The 1.8-litre model will also have CO2 emissions of 184g/km, undercutting the equivalent Ford Mondeo by a BIK tax band.
The entry-level Mondeo 1.8 LX produces carbon dioxide at a rate of 185g/km and falls into the 19% tax band, while the Vectra will be taxed at 18% of its list price, on a par with 1.8-litre versions of the Renault Laguna and Citroen C5.
The car goes on sale on May 30, but 300 fleet decision-makers will have their first chance to try left-hand drive production versions of the car in March.
Howkins said: 'Our major corporate customers will attend the launch, but there will also be another event at Millbrook in April for those who are unable to join us on the first event.'