I am a new Infiniti EX35 owner and wanted to know what people feed their EX35s. I had heard that you only need to use premium fuel is you have an 8 cylinder or higher engine but that 6 cylinder engines can run just fine on regular fuel.

Thanks

Anthony

Welcome to the EX forum, Anthony.

There are already quite a few threads discussing fuel type and mileage. Some of them are (in no particular order):

zerothread?id=345431

zerothread?id=364255

zerothread?id=337727

zerothread?id=350419

zerothread?id=345926

HTH,David

The EX will run on regular or premium. I only fill up with premium. The few dollar difference will be made up slightly better fuel economy. My car cost close to $50k so she deserves to be treated to premium gas.

sluday wrote:My car cost close to $50k so she deserves to be treated to premium gas.

I agree with you there. So far after 2 tanks we've averaged only 16.5 mpg. IMO, that's terrible but she's new and we idle her a lot while playing with all of the gadgets. It's mostly city driving which matches the sticker's expected mpg (16-23 AWD), and the A/C runs all the time.

I plan to run the first year with premium and then switch to the cheaper fuel for a comparison.

Thanks Dividedhighw for the compilation of MPG posts.

The number of cylinders in your engine has no relevance to the octane rating of the fuel required to run the engine, without suffering from pinging (or spontaneous combustions, auto ignition, detonation etc...).

What really matters is compression. High compression engines will more than likely require a higher octane rating. In other words, a fuel which is more resistant to spontaneous combustion, auto ignition or detonation.

Want to increase your fuel's octane rating? Just add water! Nah, don't do that to your Infiniti.