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This gas additive treats 20 gallons, and reduces valve & seat wear. Lead substitute. Recommended for cars without hardened valve seats.
| Make | Model | Years |
| Chevrolet | Truck | 1935 - 1960 |
| Ford | Bronco | 1966 - 1979 |
| Ford | Econoline | 1961 - 1967 |
| Ford | Fairlane | 1962 - 1970 |
| Ford | Falcon | 1960 - 1970 |
| Ford | Ford | 1949 |
| Ford | Model A | 1928 - 1931 |
| Ford | Model T | 1909 - 1927 |
| Ford | Mustang | 1964 - 1973 |
| Ford | Thunderbird | 1955 - 1966 |
| Ford | Torino | 1968 - 1971 |
| Mercury | Comet | 1960 - 1969 |
| Mercury | Mercury | 1949 - 1952 |
| Pontiac | Firebird | 1967 - 1972 |