Premium down to Regular...?

[RioRed4v]

Does going from premium grade to regular grade fuel usually work out ok?

Have a big road trip coming up and figured I wouldn't really need the Premium fuel for it, and the extra savings from regular grade would be a bonus.

Any drawbacks doing this?

 

[me32]

youll be fine if your not tuned. I wouldn't recommend it on a tune car thoe

 

[RioRed4v]

Still running the stock tune.

 

[me32]

youll be fine then. the PCM will pull timing for 87 an make less power

 

[RioRed4v]

Ok, thanks. I figured it would be ok, but just wanted to double check. Any idea how much down on power it might be? Also, is there any effects on mpg?

 

[blackbeast12]

U lose 10 hp going to 87..

 

[AntiHeightPunk]

you are going to save like 25 bucks

 

[charba951]

You'll be fine stock

 

[RioRed4v]

U lose 10 hp going to 87..

Cool. Any idea if the MPG varies with the lower octane? I would assume it doesnt.

you are going to save like 25 bucks

Closer to 100 with the amount of miles I'm driving and gas prices I've seen.

 

[AntiHeightPunk]

my calculations show in order to save 100$ you would need to take a trip over 4k miles

 

[NickSezz]

Cool. Any idea if the MPG varies with the lower octane? I would assume it doesnt.



Closer to 100 with the amount of miles I'm driving and gas prices I've seen.

Premium fuel with the correct spark advance should be more efficient since the fuel will have more time to burn.

 

[RioRed4v]

my calculations show in order to save 100$ you would need to take a trip over 4k miles

Yup.

And I said "closer" to $100;-) It'll likely be more around the $80-90 mark. I'll be right around 3,000-3,500 miles for the road trip.

 

[RioRed4v]

Premium fuel with the correct spark advance should be more efficient since the fuel will have more time to burn.

Interesting. I might run a tank or so of regular to see if makes a impact. If so, i might switch back to premium.


Thanks for the help guys:beer:

 

[blackbeast12]

Ehhh give up the cigarettes and buy 93 octane and your mustang will love you for it!

 

[ViciousJay]

Cool. Any idea if the MPG varies with the lower octane? I would assume it doesnt.



Closer to 100 with the amount of miles I'm driving and gas prices I've seen.

WHAT?! BWAHAHAHA i hope this is a joke?! Per tank you save $3 from 87 to 93 price varying but its not much. Stay with 93 and thanks yourself later

 

[MRSUPRA]

Around my area, Premium is about 35 to 45 cents higher then 87. So that would be about $6 more per tank. Seems like Premium is getting higher and higher compared to 87.

 

[GT/CS 2013]

If you bought a mustang you should be able to afford premium, mine will never see 87 octane!

 

[me32]

If you bought a mustang you should be able to afford premium, mine will never see 87 octane!

I dont really agree since up untill 2011. No mustang gt needed premium from the factory. Now if you bought a boss or gt500 you should be able to afford premium.

 

[Torchy]

Fact: you will have slightly worst MPG with 87. I work for ford and just so happen to take a fuel economy class today.

 

[01bluesnake]

Fact: you will have slightly worst MPG with 87. I work for ford and just so happen to take a fuel economy class today.

This is true. Learned this a long time ago and try to explain to people when premium is recommended, the car actually runs better and more efficient. Even at low throttle, the car is able to run more timing which will create better power and produce a more efficient burn allowing the engine to produce better mpg's. The little amount you save running 87 instead of 93, really doesn't make that big of a savings and is hard on the motor being so high compression its fighting constantly to keep detonation at bay.