87 octane on long road trip.

**gtpinsc** · 07-06-2010

i know it wont hurt to drive every now and then with a little bit of 87 in tank. staying out boost of course. im gonna be taking a 1600 mile round trip to from SC to CT. driving that far would it be cool to run 87 for a trip that long? will it affect reading in PCM and make car run silly? etc etc. ill be at 80mph with cruise set for all of trip.... just tryin to save money.

**TheOtherNick** · 07-06-2010

Run 91-93 I got 29.8 mpg with my grand Prix on the way to Florida. and you know you will get on it a couple times on the trip passing people and merging.

**matt5112** · 07-06-2010

consider this.................. higher octane lets you run more timing.......... more timing = more power AND better fuel economy. so hope your crusing timing advance tables are aggressive and enjoy the better fuel economy as well as being able to hammer it and watch your engine make it out alive

**gtpinsc** · 07-06-2010

i have stock pulley and stock tune at the moment and have flow mods with 605's.. even still? savin 20-25 cents a gallon would be sweet...

**matt5112** · 07-06-2010

ew wtf?!@#!@#$ put the pulley and your reptile PCM back in. you should get better fuel economy with it than on the stock.

**gtpinsc** · 07-06-2010

Originally Posted by matt5112

ew wtf?!@#!@#$ put the pulley and your reptile PCM back in. you should get better fuel economy with it than on the stock.

minor issues with that at the moment.

**matt5112** · 07-06-2010

Only way to know is try 2-3 points lower octane than what you normally run and see if it knocks.

then keep going down and seeing where it starts to knock and run the lowest octane you can get away with knock free.

**gtpinsc** · 07-06-2010

fuk it, not worth it .... i did the math... id only save around 17 bucks anyways. i thought it would shave off alot more than that.

**matt5112** · 07-06-2010

see why running the proper octane shouldnt worry you?

**gtpinsc** · 07-06-2010

yes.. the extra 25 cents a gallon really isnt ****.

**matt5112** · 07-06-2010

how much you're in the gas determines how much you ultimately spend on gas.

**gtpinsc** · 07-11-2010

used 93 the whole trip..... averaged 24.2 MPG for 1600 miles. speeds between 80-90mph... with average speed 85mph. with a few WOT pulls up to 100ish playing with other cars. not bad if ya ask me. anyone ever hear blower whine at 100mph in a tunnel with all windows down.... fukcin awesome

**boostedcompg** · 07-11-2010

Agreed

**matt5112** · 07-11-2010

Dude, ******* you guys and your ****ing radar detectors.... 75 MPH is all I dare on our roads.

**03GTPLE** · 07-11-2010

...radar detectors...?? I averaged 90MPH from Colorado to Alabama and got about 24 MPG.... no radar detector here, 2000 miles, and pulled over in Texas for doing 3 MPH over.... c'mon!..3 over?! I even got a written warning!

**matt5112** · 07-11-2010

You dont want to get caught speeding if you're under 25 here.

insurance will bend you over backwards.

**03GTPLE** · 07-11-2010

oh... I'm not under 25

**matt5112** · 07-11-2010

Then speeding tickets mean almost nothing haha.

If you're under 25, speeding tickets really do much more hurt than the cost of the ticket.

**03GTPLE** · 07-11-2010

well, the other nice thing is that if I get a ticket outside of Colorado, then Colorado doesn't want to know about it, therefore, neither does the insurance company...unless I tell them.

I haven't had one in many many years either.