Table:
text: Tony Bettenhausen
Complete Formula One World Championship results
Complete Formula One World Championship results
Year_ Entrant Chassis Engine Points
1950 Blue Crown Spark Plug / Moore Kurtis Kraft 2000 Offenhauser L4 1
1951 oil Mobil / Rotary Engineering Deidt Tuffanelli Derrico Offenhauser L4 0
1952 Blue Crown Spark Plug / Earl Slick Deidt Tuffanelli Derrico Offenhauser L4 0
1953 J.C. Agajanian Kuzma Offenhauser L4 0
1954 Automobile Shippers / Casaroll Kurtis Kraft 4000 Offenhauser L4 0
1955 H.A. Chapman Kurtis Kraft 500C Offenhauser L4 3
1956 Belanger Motors Kurtis Kraft 500C Offenhauser L4 0
1957 Novi Racing Kurtis Kraft 500F Novi V8 0
1958 Jones & Maley Cars Epperly Indy Roadster Offenhauser L4 4

text: Tony Bettenhausen
Complete Formula One World Championship results
Complete Formula One World Championship results
Year_ Entrant Chassis Engine Points
1959 Hoover Motor Express Epperly Indy Roadster Offenhauser L4 3
1960 Lindsey Hopkins Watson Indy Roadster Offenhauser L4 0

Question: What was the engine of the Hoover Motor Express after 1955 with more than 0 points in Tony Bettenhausen's overall result in the Formula One World Championship?

Question: What is the average year the Belanger Motors had an Offenhauser l4 engine?