Can eight rakat salah (nafil) be offered in one Salam.
Answer
(Fatwa: 882/882/M=1432)
One can do so in nafl salah in nights, but in day time it is makrooh to perform salah of more than four rak’at with one salam:
وتکرہ الزیارۃ علی أربع فی نفل النھار وعلی ثمان لیلاً بتسلیمۃ (الدر المختار)
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband