regular or premium gas

[dateg88]

I was just wondering if it would be better to run premium gas over regular in my jdm b18c gsr it just has headers intake and itr came but was just wondering

 

[thenoxus1]

Your car specifically says run premium, so do so. If you don't you risk detonation in the motor.

 

[Samurai_Blue]

the B18C motors require 91 octane but will run on 87...but really require 91 octane. This isnt like the STis where you can run 91 instead of 93. The subaru runs optimally at 93 but will run on 91 because of avalibility. Where as teh GSR will need 91 at all times but will run on 87

 

[dateg88]

Were does it say that

 

[JDMxDB8]

Are you saying that you've been using regular gas on your engine?

 

[thenoxus1]

On an OEM GSR or Type R cluster it will say on the speed gauge Premium Fuel.

 

[dateg88]

the B18C motors require 91 octane but will run on 87...but really require 91 octane. This isnt like the STis where you can run 91 instead of 93. The subaru runs optimally at 93 but will run on 91 because of avalibility. Where as teh GSR will need 91 at all times but will run on 87

Thanks ur always helpfully lol an do great job giving reasons for your response thanks

 

[JDMxDB8]

the B18C motors require 91 octane but will run on 87...but really require 91 octane. This isnt like the STis where you can run 91 instead of 93. The subaru runs optimally at 93 but will run on 91 because of avalibility. Where as teh GSR will need 91 at all times but will run on 87

^ Easier Explanation: You can use 87/89 octane, but you should've rev it that high to avoid detonation. But to be able to drive the car without any worries, I would highly recommend using high octane gas (ex. 91 or 93).

 

[JDMxDB8]

On an OEM GSR or Type R cluster it will say on the speed gauge Premium Fuel.

The OP has a DA. Mostly likely not a DB2 GS-R, which is why he can't find anything saying that says "premium unleaded fuel only".

 

[dateg88]

On an OEM GSR or Type R cluster it will say on the speed gauge Premium Fuel.

Oh well since I have a 93 gs that didn't help lol but thanks

PS not trying to be a smart ass

 

[thenoxus1]

Ahh, good point, thought it was a JDM front from the quick avatar glance. But regardless, those engines should really be getting premium.

 

[dateg88]

The OP has a DA. Mostly likely not a DB2 GS-R, which is why he can't find anything saying that says "premium unleaded fuel only".

Lol u beat me to it but I've been running mid grade ie 89 in it

 

[Samurai_Blue]

^ Easier Explanation: You can use 87/89 octane, but you should've rev it that high to avoid detonation. But to be able to drive the car without any worries, I would highly recommend using high octane gas (ex. 91 or 93).

:thumbs up thanks matt

 

[JDMxDB8]

Lol u beat me to it but I've been running mid grade ie 89 in it

To sum it all up, just fill up with the highest octane and you'll be trouble free.

 

[dateg88]

Thanks premium for now thanks