What Gas for Which Motor?
 

what gas to use in a B16 motor? and a D16Y8?(SI)

I've noticed my si actually likes 87 > 89/91

b16 id go with 91 and for the d series 87 ftw

but the B16 is 10:1 and the D16 is 9.6:1 is the .4 that much of a difference?

99-00 SIR calls for 91 octane
96-00 SI calls for 87 octane
Check your owners manual.

in a pickle you can use lowgrade octane gasoline and the knock sensor will take care of the rest...tho fuel mileage and performance may suffer a bit...at a buck 20 a litre I'm starting to hate my GS-R haha

b16 can run on 87 no problem...just dont push the engine hard.

my manual says to use 91 or higher research octain. 91 civic dx 4 door.

Attachment 40602

your also reading a manual from 1991 or earlier. Gas quality has gone up sooo much from then. A d series engine doesnt need 91. 87 is fine for a d. You can use 91 in it but there is probably no gain other than a few extra k .
My B16 has head work done and I run 94 and in a pinch I run 91.
The less detination the better!

yah.. thats 91 RON.... u don't need anything above 87 in a Si