REVscene Automotive Forum - View Single Post - Is it important to use Honda transmission fluid in 99 Civic SiR?

91civicZC · 05-30-2017, 08:14 AM

Old Honda transmissions used motor oil, its specified in both the owners manual and service manuals I have for 91 civics. After that (92-95?) I believe they started noting to use HMTF and only use Motor Oil in an emergency.

Looking at the service manual for the 99 Si (USDM Sir) it says to "only use HMTF", although only says that "Using motor oil can cause stiffer shifting because it does not have the correct additives".

Id use HMTF just to try and stay away from issues down the road. It will have a different additive pack specifically for the transmission, and its what Honda designed it around. Cheap insurance, simple job, may as well use what the service manual says.

05-30-2017, 08:14 AM	#2
91civicZC 14 dolla balla aint got nothing on me! Join Date: Oct 2001 Location: Maple Ridge Posts: 654 Thanked 279 Times in 95 Posts Failed 47 Times in 13 Posts	Old Honda transmissions used motor oil, its specified in both the owners manual and service manuals I have for 91 civics. After that (92-95?) I believe they started noting to use HMTF and only use Motor Oil in an emergency. Looking at the service manual for the 99 Si (USDM Sir) it says to "only use HMTF", although only says that "Using motor oil can cause stiffer shifting because it does not have the correct additives". Id use HMTF just to try and stay away from issues down the road. It will have a different additive pack specifically for the transmission, and its what Honda designed it around. Cheap insurance, simple job, may as well use what the service manual says.