Friend of mine is wondering what Amsoil oil to use.
1969 Firebird
Mostly a 1/4 mile car but sees the street every so often maybe 1,000 miles a year
11.25:1 compression
390hp at the wheels
400CI big block ram air 4 (carbureted)
4spd trans
I wasn't sure what to suggest, was thinking RD30 or RD50 but not sure which would be better.
1969 Firebird
Mostly a 1/4 mile car but sees the street every so often maybe 1,000 miles a year
11.25:1 compression
390hp at the wheels
400CI big block ram air 4 (carbureted)
4spd trans
I wasn't sure what to suggest, was thinking RD30 or RD50 but not sure which would be better.