I've read all the threads saying "OMG UR CAR WILL BLOW UP GOT 2 PAY 2 PLAY" so please don't bother with that

I had my gas lines frozen last week due to some warm/cold/warm/supercold weather cycles building up condensation then freezing it.

here 87 and 89 are sold with 10% ethanol (antifreeze) but 91 is not.

Will running non-premium fuel simply reduce my fuel economy? Consumption is already through the roof when it's really cold outside, so not too concerned with that for winter.

I have trouble believing a modern vehicle would actually ping on 87

 

It will not knock or ping, it will adjust to the fuel you're using. You will have slightly decreased performance.

 

When you switch over I would reset the ecu so the car relearns for the lower octane fuel.

 

lower octane fuels have more ethanol in them which is not good for your engine. I won't recite all the reasons just do a google search. If you use a high quality fuel system cleaner every other oil change you should be fine.

 

lower octane fuel rating will cause the engine to knock or ping during cold starts and under load. the knock or ping is caused by preignition inside the combustion chamber. this as a result will also cause the engine to run rougher compared to using the required 91 octane. and no your engine should not explode if you run lower octane fuels but it will affect the overall performance and efficiency of the engine. the way i see it is the difference between 87, 89, and 91 octane fuels in cost is usually about 0.10 to 0.20 cents. now if you put in 15 gallons of gasoline that amounts to approximately 1.50 to 3.00 between using lower octane versus 91 octane. i for one baby my car especially when it comes to engine performance, i for one am not willing to saving up to 3.00 to listen to my engine ping and knock.

 

89 with 5% ethanol from shell should do thats the only gas station i know that has 5% as oppose to 10%. But if i were in your shoes seeing how cheap gas is for you guys in the state i would just stick goes with highest possible. Im paying 5 dollars per gallon for 94 octane at chevron, around my neighbourhood thats really cheap.

 

There are numerous threads on 87 octane

New Jersey to Florida round trip with my G : G35 and G37 General Discussions

Neither one of my two Infiniti's has blown up yet. 171796 miles on my 06 G35 and my current 2012 G37S has never seen a drop of premium


Telcoman

 

don't recite the reasons, just re-read my OP and the reason I'm looking to run 87/89

what's worse, some preignition or no fuel at all? I suspect you didn't read past the thread title


thanks for the input. I agree there are numerous threads, but most of them immediately go into the generalities of why some vehicles require premium and don't touch on what the g37 will actually do if it doesn't get it.

we're down to around $4USD/gallon for premium here in manitoba, which is nice! I think I was nearly at $6USD/gallon a couple of months ago.

I think I'll take my chances and run 89 until things warm up a bit, I don't want to get stranded somewhere because I forgot to put in gasline antifreeze

 

The ECU in modern cars will adjust your timing & air to compensate for the lower octane. Gone are those days on modern cars.
I still would not use 87 in a high compression engine though. The savings between 87 & 91/93 are not really that great in the long term. I rather have a car that perform as it was designed that I bought with my $ then not.

 

Sounds like the OP is more concerned with freezing gas lines than cost of fuel.

I'm from Winnipeg, yes we went from 33F to -25F in two days which caused some havoc. Now my car is garaged all winter but my friends G37 and 370z all run Shell V-Power 91 Octane (No Ethanol) all winter. You know our winters are a solid freeze so this blip in weather shouldn't happen again, you should be fine running 91 all year. Of course keep that CAA card handy....

 

I also keep my car in insulated but unheated garage which adds to the temperature fluctuation. so cold in winnipeg this week!

I didn't realize there was any other wpg people here, how are the potholes treating you? Half the time I'm so annoyed that I wonder if I should trade into a FX.

 

G37 community is very very small. I only know of one Greddy Turbo and a GTM supercharged (I believe it was written off) that are worth mentioning.

370z are by far the majority.

I don't drive in the winter or rain haha. My suspension/ride setup pretty much allows me to cruise down set routes only. Living here makes me second guess investing any more into my car.

 

I wonder if the lack of local AWD dyno contributes to that. I've seen a 370z with a FMIC in my area (waverley west)
I'd love to go FI but to have to go to MN for tuning is a deal breaker, I need a daily.
even lowered the g37x w/ winter tires is an absolute monster in snow, lots of fun. I've got an suv for heavy snow days

 

Wow....No way i would put up living like that.....I like my 80 degree day today in Miami!

 

I was in orlando in november, it went from 86f to 35f in a day :P one day swimming in the pool wondering if I'm going to get heat stroke, the next day annoyed that I left my winter jacket at home haha