i have a 2005 g35 coup'e and was just wondering on this i have put 89 octane in my tank ever since i had my car but i see some people get v-power at the shell gas stations so just wondering is it useless to get the v-power or does it help ur engine and make it feel abit faster?

 

I always use 91 v-power or 91 Costco. I am sure it is better for performance, but I do it because I have pinging issues and this helps, plus it says right there inside the gas door it is recommended.

 

yea it dosent say on the gas door what octane though so is 89 too low im thinking of using 91 0r higher but will it mess my G up or is it fine? also i mean do you feel any more of a torgue gain by using v-power since its all gas no ethnol?

 

no DO NOT use 89 octane. It will hurt your motor running gas with less than required octane by nissan. Shell V-power is the best gas hands down. BP invigorate is good too. it states in the owners manual 91 or higher, so no it will not mess up your G. I use Shell or BP 93 only.

 

dam thanks tank alot i have used 89 for awhile now but today i am changing and using v-power for now on. also still goes to my question does the 91 v-power help with power any like can you feel abit of more push to the car or no, just wondering

 

No, it will not hurt your motor. Timing will be retarded by the ecu and a slightly richer mixture will be introduced into the cylinder as its harder to pre-ignite.

 

damn read the gas door, owners manual much?

 

These cars were designed to run on 91 octane.

 

89 octane? Are you using the premium at the gas station? Because 89 seems low for premium gas... I believe my gas stations have 92 octane on their premium.

 

Higher octane pump gas will neither increase your mileage nor your power. High-octane fuel is simply a cleaner version of the hydrocrabons used in regular unleaded fuel. It cuts down on the knocking because it is more resistant to self-ingnition, and knocking as many unfortunate people have found out, damages your engine.

 

Ummm...Higher octane fuel burns slower than lower octane fuel which is the reason why it is more resistant to detonation and it WILL allow for more power to be developed if the engine is designed to take advantage of it ( like our engines do ).

 

Typical vehicles (like ours) don't have enough compression to utilize the higher octane and get any noticeable mpg increase. You're wrong about the performance, plain and simple unless you're talking about advancing the timing, which isn't what the OP asked about. Prove me wrong by a respectable source and I'll give you a high-five.

 

+1000

 

The gas door says premium unleaded fuel and the owner's manual recommends premium 91 or higher? You could use 89 octane for a short period if your gas station doesn't have 91.

 

Also, I should clarify that I'm talking about higher octane past what is recommended by the manufacturer. Lower octane will certainly decrease power AND mpg. I should have been more clear on that. However the rest of my statements still stand. Not speaking of our cars, but if you have a car that takes 89 octane, getting 91 won't do anything for you for either performance or mpg. Same goes for octane boosters, they do absolutely nothing for you if you're already running 91 octane.