premium gas?

[DerrickCaracter]

do all of you use premium gas?

[clickman]

94 octane

[vath2001]

Yes. I used to be able to 94, but the one gas station doesn't have it anymore, so I'm running 93. I will run 92 if I have too.

[johnsimion]

Heck, all I can ever find is 91 octane for my Cayman. That is the normal "premium" here in Missouri. The car seems to run fine on it, although if I could find 93 or 94 octane, maybe it would run better yet. I do try to avoid the 91 octane that says it contains methanol, since the methanol would indeed reduce performance over a comparable "straight" 91 octane.

[Flavor 987S]

93 Pure Gas. Ethanol free baby!!

[ppbon]

I write monthly technical articles for a few dozen PCA Regional Newsletters.
One in particular touches on this point.

Here's the complete article: http://www.pedrosgarage.com/Site_5/Octane_Ratings.html

Happy Boxstering,
Pedro

[Flavor 987S]

www.pure-gas.org/index.jsp?stateprov=WI

[jcb986]

Your Porsche will actually run on Regular because of the Variable Timing. What you lose is performance and gas mileage.

[Beelzy]

All the Porsche owners who read their Owners Manual do.

[Topless]

Easy Flav, we are all friends here. No need for insults.

The fact is our cars are pretty smart and they will run on 87 octane, but they were designed to run 94 premium. Run 94 when you can. If you are stuck in commiefornia 91 is the best you can do, and 87 only if you have no other choice.

[Flavor 987S]

Oh, so in the unlikely event (but it could and does happen) a 986Forum member follows Jcb986's advice, and their engine goes BOOM, are all you naysayers going to chip-in and bail them out?

[d18mike]

Local Sunoco station just added 104 octane race fuel to its lineup. There are apparently enough racing boats in this area that use it to justify adding the pump. Its over $6 a gallon. I've only seen 2 people buying it -- both with newer Ford Mustangs. Go figure.

I'll pass. Everything I've read says that Porsche sets the cars for performance at standard octane ratings. Good enough for me.

[Jake D]

Originally Posted by d18mike

Local Sunoco station just added 104 octane race fuel to its lineup. There are apparently enough racing boats in this area that use it to justify adding the pump. Its over $6 a gallon. I've only seen 2 people buying it -- both with newer Ford Mustangs. Go figure.

I'll pass. Everything I've read says that Porsche sets the cars for performance at standard octane ratings. Good enough for me.

I was wondering if higher octane would work or not.. I've run turbo blue 104 in my harley before and it makes a difference plus it gives off that amazing smell. Love the stuff but its hard shelling out over $7 a gallon.

[d18mike]

The stock DME settings on the Boxster are calibrated for the engine to run on pretty low Octane fuel -- obviously the car is base tuned to a somewhat low common denominator so if you get caught in a place with 87, you do no damage.

I think if you flash tuned the DME with Softronics or another product you could probably tell at least a little difference with a higher octane. I know that one of the side effects of Flash tuning is that you need to runner "higher" octane fuels thereafter as the tuning impacts detonation/timing. I doubt "higher" means 104 -- but probably 91+.

I think high octane fuel is to men a little bit like what anti-wrinkle cream for women: expensive hope in a bottle!

[Overdrive]

Originally Posted by d18mike

I think high octane fuel is to men a little bit like what anti-wrinkle cream for women: expensive hope in a bottle!

Quote of the day. Thanks for the laugh, mike.

[edevlin]

I have to use premium because the Autothority chip I am running requires it,



Ed