premium gas only...ethanol?

[Hydrastas 10+ year member]

at my local casey's store they have their "premium" gas 10 cents or so cheaper than the regular. it's a 89 octane compared to the more expensive one which is 87 octane. would the 89 one be alright to run in my eclipse which calls for premium gas only?

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[Rich B 5,000+ posts]

89 octane is the same as a mid grade gas.

You need a higher octane (here in Ca. its 92) to equal premium.

 

[mavster 10+ year member]

Eclipse should be using 92 or 93 octane gas...

 

[Hydrastas 10+ year member]

****, then **** casey's

 

[Hydrastas 10+ year member]

luckily i only put in 3 gals or so. only reason i went to caseys is cause they're only place that would currently take my check lol.

 

[miker 5,000+ posts]

I'm pretty sure you aren't going to ruin your car using regular gas.. lol..

 

[lilmaniac2 5,000+ posts]

I'm pretty sure you aren't going to ruin your car using regular gas.. lol..

well your pretty wrong. Running cars that are designed to run on higher octane fuels can cause major issues in the long run. Sure a half a tank isnt going to hurt it, but running the lower octane fuel could cause incomplete combustion and detonation, i think.

 

[miker 5,000+ posts]

well your pretty wrong. Running cars that are designed to run on higher octane fuels can cause major issues in the long run. Sure a half a tank isnt going to hurt it, but running the lower octane fuel could cause incomplete combustion and detonation, i think.

Then why don't all cars need to run on higher octane gas?

 

[lilmaniac2 5,000+ posts]

Then why don't all cars need to run on higher octane gas?

because of the high performance nature of the eclipse engine. The dsm engine has alot of issues with crankwalk etc.

Whatever your owners manual says to use, is what I would use.

 

[lilmaniac2 5,000+ posts]

Also some motors are more prone to wear, ie turbos and need the higher octane fuel, im by far no expert I just know what i've heard over the years.

 

[miker 5,000+ posts]

Alright.. I gues that makes sense..

Just from what I've heard.. Higher octane fuels will give you more efficiency, like you will get the most horse power out your engine.

 

[jdawg90 10+ year member]

Alright.. I gues that makes sense..
Just from what I've heard.. Higher octane fuels will give you more efficiency, like you will get the most horse power out your engine.

only if the car is designed for higher octane fuel... running it in a car designed for regular will not increase power or efficiency

 

[lilmaniac2 5,000+ posts]

only if the car is designed for higher octane fuel... running it in a car designed for regular will not increase power or efficiency

truth, but i always want to try the 89 octane in my car even tho its not designed for it, it could help you never know til you try //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[mokedaddy 5,000+ posts]

only if the car is designed for higher octane fuel... running it in a car designed for regular will not increase power or efficiency

My car performs considerably worse when running premium vs regular.

truth, but i always want to try the 89 octane in my car even tho its not designed for it, it could help you never know til you try //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

There really isnt much difference between 87 and 89 octane A little extra ethanol and thats about it. Depending on where you live, and whichever one is cheaper, that is the one I would recommend.

 

[mackin 10+ year member]

my car