Feul Economy

nmackay · 04-19-1999, 09:35 PM

I drive my 69 Coupe about 70 miles a day and get about 20 miles per gallon. Are there any tricks that I can try to get better feul mileage?

macgyver · 04-21-1999, 10:19 PM

Higher Octane will give you better milage.
What type of tranny do you have? Putting in an AOD or T-5 manual will help you out on the high way (overdrive gear for cruising.)

Pretty much anything that will add HP will add mileage. Try a K&N air filter, electric as opposed to mechanical fan, hi-po exhuast...etc...

todd_newton · 04-23-1999, 11:28 AM

I personally thought that if your motor did not need the extra octane you would recieve no benefit from it. So if your engine is not knocking then dont bother. I do agree with the aod or t5 and any other add ons. I would start with the K&N. another thing you might want to consider is changing the rear gear in the car. It will slow it down a little but also increase your milage .

macgyver · 04-23-1999, 02:38 PM

If I put Sunnoco Ultra 94 in my car with an octane booster (from Gunk or other)I get about 22-24 MPG on the highway. If I put in Sunnoco 93 (straight)I only get about 19 or 20. Also, you should remember that the 289 Mustangs were meant to run 94 or better. (See the owners manual). Going lower can lead to slight overheating and strain.

As for the other ideas on the adding MPG thing. YEAH, putting a new gear in your rear end would help out. Also, electronic ignition does too. In fact, it is a generally good thing to do anyhow. Much more dependable and adjustable. K+N air filters are what I go for also...

Dark Knight · 04-23-1999, 03:52 PM

might want to go as simple as putting a taller tire on the car too...if it's a 2-barrel carb, go to a 4v carb... if you can keep from standing on it, you'll get better milage too ;-)

------------------
84 convt,'95 302, performer
3.55's, underdrives shorties
and a '68 stang that WAS nasty ;-)

04-19-1999, 09:35 PM	#1
nmackay Registered Member Join Date: Apr 1999 Posts: 6	Feul Economy I drive my 69 Coupe about 70 miles a day and get about 20 miles per gallon. Are there any tricks that I can try to get better feul mileage?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Fuel Economy	Foxtrot X-Ray	Windsor Power	6	06-21-2004 09:25 AM
fuel pump choice...fuel economy???	fongo	Windsor Power	3	09-28-2002 10:03 AM
Poor Fuel Economy. Any solutions?	txsilver	Blue Oval Lounge	2	03-05-2002 04:09 PM
Fuel Economy Questions	txsilver	Modular Madness	1	03-04-2002 07:30 AM
Fuel Economy	txsilver	Small Ponies	1	03-01-2002 03:04 PM

04-21-1999, 10:19 PM	#2
macgyver Registered Member Join Date: Feb 1999 Location: Boston, MA, USA Posts: 17	Higher Octane will give you better milage. What type of tranny do you have? Putting in an AOD or T-5 manual will help you out on the high way (overdrive gear for cruising.) Pretty much anything that will add HP will add mileage. Try a K&N air filter, electric as opposed to mechanical fan, hi-po exhuast...etc...

04-23-1999, 11:28 AM	#3
todd_newton Registered Member Join Date: Mar 1999 Location: houston Posts: 18	I personally thought that if your motor did not need the extra octane you would recieve no benefit from it. So if your engine is not knocking then dont bother. I do agree with the aod or t5 and any other add ons. I would start with the K&N. another thing you might want to consider is changing the rear gear in the car. It will slow it down a little but also increase your milage .

04-23-1999, 02:38 PM	#4
macgyver Registered Member Join Date: Feb 1999 Location: Boston, MA, USA Posts: 17	If I put Sunnoco Ultra 94 in my car with an octane booster (from Gunk or other)I get about 22-24 MPG on the highway. If I put in Sunnoco 93 (straight)I only get about 19 or 20. Also, you should remember that the 289 Mustangs were meant to run 94 or better. (See the owners manual). Going lower can lead to slight overheating and strain. As for the other ideas on the adding MPG thing. YEAH, putting a new gear in your rear end would help out. Also, electronic ignition does too. In fact, it is a generally good thing to do anyhow. Much more dependable and adjustable. K+N air filters are what I go for also...

04-23-1999, 03:52 PM	#5
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	might want to go as simple as putting a taller tire on the car too...if it's a 2-barrel carb, go to a 4v carb... if you can keep from standing on it, you'll get better milage too ;-) ------------------ 84 convt,'95 302, performer 3.55's, underdrives shorties and a '68 stang that WAS nasty ;-)