Hey is it true that B series requires premium gas? will it ruin the motor to use regular?

 

i have a jdm b18c and use only premium gas. i did try to use 87 or 89 octane at first till the motor started to run like crap. then i switch to 91 octane and it ran much better. i guess if you have a jdm motor it does require premium due to its high compression but i wouldnt know about usdm motor though never owned one.

 

I run 91 on my stock gsr it runs fine

 

I believe 91 is recognized as premium gas.

Don't know about B18A/B but GSR, SI and ITR motors require to run at least 91 octane gas because of the 10.x:1+ compression ratio.

I'm not saying the car won't run on lower octane fuels, but you might experience ping.

I sure wouln't run anything lower than 91 octane on K20A2 motors.

 

thanks guys. yeah it is a JDM B16A

 

93-OCT STREET 100-OCT AT THE TRACK

 

Have JDM type R and run nothin but 91+ octane....You can run the lower octane but your car is going to run like ****