B-12 safe for 2 stroke engines? October 30, 2024 Solutions Central › Category: -Questions - General › B-12 safe for 2 stroke engines? 0 Vote Up Vote Down Jim asked 2 months ago Is B-12 safe for use in 2 stroke engines? 1 Answers 0 Vote Up Vote Down chemtooler Staff answered 2 months ago Yes, Berryman B-12 Chemtool Fuel Injector Cleaner (part #0116) is safe for all 2-stroke and 4-stroke engines. Please login or Register to submit your answer Username or Email Address Password Remember Me