С официального сайта техники Briggs&Stratton. Для сомневающихся в ДНП!
What is the best small engine or lawn mower gas?
Fuel for your lawn mower or outdoor power equipment must meet these requirements:
Clean and fresh - fuel can begin to deteriorate in as little as 30 days
A minimum of 87 octane/87 AKI (91 RON); If operating at high altitude, see below
Gasoline with up to 10% ethanol (gasohol) or up to 15% MTBE (methyl tertiary butyl ether), is acceptable. Some fuel stations are now selling gasoline with up to 15% ethanol. This E15 product is not recommended or