HP4S is compatible with synthetic blends such as HP4, as well as regular petroleum oils like GN4. There is no need to flush the crankcases before switching to HP4S. And best of all, HP4S provides maximum power due to less frictional drag.
4 Quarts Honda Genuine Transmission Fluid for Honda Accord Civic OEM 08200-HCF2
(LOT OF 4 QUARTS) PRO HONDA HP4 4-STROKE MOTOR OIL 10W-40 32 OZ 08C35-A14W0M
HONDA PRO HP4 4-STROKE MOTOR OIL 20W-50 32 OZ 08C35-A25W0M (4 QUARTS)
4 Quarts Genuine Honda Transmission Fluid ATF Type 3.1 OEM! NEW! 08268-P99-4EDAD
Genuine Honda 08200-9008 Automatic Transmission Fluid ATF DW-1 – (4 Quarts)
HONDA/ACURA OEM ATF TYPE 3.1 - 4 QUARTS (P/N: 08200-9017)