The win is one of two new online briefs in a week for the agency.
BoilerJuice wants Lewis to raise its profile in the media and increase subscriber numbers.
The website allows users from adjacent postcodes to bulk order heating oil for their homes. It is interactive, allowing members to comment on its blog, access RSS feeds, or read the latest industry news. Recent BoilerJuice campaigns include an online petition to Gordon Brown to remove oil duty for pensioners.
A study commissioned by the website showed the average price of heating oil per household was up £300 year on year to £970.
BoilerJuice aims to 'revolutionise the oil supply chain' by offering the cheapest possible prices in each respective region, with members effectively splitting the cost of an oil tanker.
Quotatis, a recommendation website providing business leads to local tradesmen, has also hired Lewis on a similar brief.
The website, a UK subsidiary of French company Quotatis SA, matches customers to reputable suppliers by postcode and requirement.
The online trade quotes market is becoming increasingly saturated, with Laterooms.com founder Steve Walsh recently hiring PR support for his latest venture, builders' recommendation portal Quote.co.uk (PRWeek, 5 December 2007).
Lewis' two web wins come after the loss of a six-figure account to rival tech firm Firefly following an acquisition (PRWeek, 7 February).
The recently merged IT services business Steria chose Firefly as its UK PR firm following its purchase of outsourcing outfit Xansa.
Lewis had worked on Xansa's business for two years, and lost out to Firefly in a two-way pitch.
Lewis' newly promoted London general manager Anna Longstaff described both wins as part of an agency move towards online PR.