My goal is to get 25+ mpg from my 99 XJ with 30 x 9.5 R15 ATs - Page 32 - JeepForum.com
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Unread 08-17-2013, 02:23 PM   #466
rebelbowtie
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It's funny because I sold my 2500HD for an Audi because the amount of fuel I was saving would make up for the car payment. A few years later I sold the Audi for a V8 Toyota 4Runner and a lifted XJ....yea I think I made a wrong turn somewhere on fuel savings.

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Unread 08-17-2013, 04:53 PM   #467
Newtons3
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Lets be real. Look at what I drive. Im not looking to set any records. I just want my stuff efficient and Id like to extend my driving range. More Prius owners to piss off per tank. Thats how I measure my success, in that ratio -POPO/Tank. I know, pathetic. But everyone needs a purpose....
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Unread 08-17-2013, 10:54 PM   #468
Charley3
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Way earlier in thread Mschi asked why I referred to my Napa certified mechanic.

I meant A.S.E certified. It is also a Napa certified shop, but A.S.E. is what I meant to say.
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Unread 08-17-2013, 11:04 PM   #469
Charley3
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Pound for pound, I think my Buick is as effiicient as a Prius.

My dad said that regarding my full size Buick Park Ave vs my mom's Prius. He's driven both on road trips.

My Park Ave averages 34.65 mpg at 70 mph (averaging two road trips together). The Prius averages 50 mpg. But if you consider how much larger and heavier my full size Park Ave is, they have comparable efficiency. Pretty freakin awesome for a 97 full size luxury car.

Also, my Park Ave has serious acceleration and top speed. The Prius doesn't have that level of performance.

So I'd call my Buick a hypermiling success. There's still at least two more mods I am going to do to Buick. My goal is 38 mpg at 70 mph highway. When I get at least 37 mpg I'm going to call local newspaper.
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Unread 08-19-2013, 01:04 PM   #470
Newtons3
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Which engine/transmission is in the Buick?
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Unread 08-19-2013, 01:07 PM   #471
Newtons3
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Im going to try again. Has anyone had any experience mixing gasoline and acetone?
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Unread 08-19-2013, 03:52 PM   #472
tbart16
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When I swap my snow tires on to my subi I lose 1.5 MPGs I have experimented over a 2 year period with 2 sets of tires and winter and summer fuels. Tires make a difference.
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Unread 08-19-2013, 05:05 PM   #473
mschi772
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Quote:
Originally Posted by Charley3 View Post
So I'd call my Buick a hypermiling success. There's still at least two more mods I am going to do to Buick. My goal is 38 mpg at 70 mph highway. When I get at least 37 mpg I'm going to call local newspaper.
Those late 90s Buicks have some nice aerodynamics. I'm sure they're not perfect, but they do seem to cut through air quite nicely. I think you've got a good thing going with that luxury, power, and efficiency balance in a Park Ave.
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Unread 08-19-2013, 06:02 PM   #474
JMH21814
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Originally Posted by Newtons3 View Post
Im going to try again. Has anyone had any experience mixing gasoline and acetone?
I don't think anyone's responded to you because no one's mixed gasoline and acetone. At least, I haven't, anyway.

What would mixing the 2 do? More power? Better mileage? I have some acetone I bought at a hardware store, but I never considered putting it into my gas. What kind of ratio are we talking? Or is that your question to us?
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Unread 08-19-2013, 07:55 PM   #475
Newtons3
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The rumor is that mixed at 3 oz. to 10 gal. your mileage is significantly increased. I have been a skeptic and nay-sayer for years, but on further consideration, there may be something to this. I have been known to doctor fuel in the past and I know how little it takes sometimes to see results.
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Unread 08-20-2013, 12:06 AM   #476
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My '01 XJ used to get about 15 3/8 MPG, pretty much all the time. I put in a set of the 4 hole injectors, and my in town mileage went down to about 14. BUT, my hiway mileage went up to about 17-19. I recently re-geared from 3:55's to 3:73's. Which actually seemed to help the hiway mileage even more. I too am running 30x9.50's(Michelin LTX M/S), Also have a K&N FIPK, throttle body spacer and a JET chip. Had an MSD DIS 6 for about 5 or 6 years until it crapped out. THAT was a total waste of money. No noticeable improvement at all. Sent it back to them for repair. "No serviceable parts. Economically unrepairable". The 4 hole injectors and the FIPK made the most noticeable improvements. The TBS is just a whistle. Might help keep the deer away though. If you're looking for 25 MPG, you had better install a manual trans and some front lock-outs. If you're looking for an economy car, don't buy a Jeep.
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Unread 08-20-2013, 09:32 AM   #477
Newtons3
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Quote:
Originally Posted by xj2k1 View Post
My '01 XJ used to get about 15 3/8 MPG, pretty much all the time. I put in a set of the 4 hole injectors, and my in town mileage went down to about 14. BUT, my hiway mileage went up to about 17-19. I recently re-geared from 3:55's to 3:73's. Which actually seemed to help the hiway mileage even more. I too am running 30x9.50's(Michelin LTX M/S), Also have a K&N FIPK, throttle body spacer and a JET chip. Had an MSD DIS 6 for about 5 or 6 years until it crapped out. THAT was a total waste of money. No noticeable improvement at all. Sent it back to them for repair. "No serviceable parts. Economically unrepairable". The 4 hole injectors and the FIPK made the most noticeable improvements. The TBS is just a whistle. Might help keep the deer away though. If you're looking for 25 MPG, you had better install a manual trans and some front lock-outs. If you're looking for an economy car, don't buy a Jeep.
Would you happen to have a diagram of how you integrated the MSD with the coil rail?
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Unread 08-20-2013, 03:28 PM   #478
Charley3
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Which engine/transmission is in the Buick?
Buick 3800 Generation 2.

No ideas what transmission. It's a 4 speed auto with torque lockup.
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Unread 08-20-2013, 06:22 PM   #479
RacerX
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Originally Posted by Charley3 View Post
How is the topic of Winter vs Summer gas relevant?

You can only buy the gas available in that season.

No matter which gas, the Jeep mods still help.

So how is the blend of gas relevant when you have to buy what's available?

Am I missing something?
Go to craigslist, get a free 55gal drum (or few) fill them in the winter, use them in summer.**

**There are many do's and don'ts e.g. do not fill them up - they need expansion room. you may want to lay them on side so they can be 'stired' (or rolled)......
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Unread 08-20-2013, 07:02 PM   #480
Charley3
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Originally Posted by mschi772 View Post
Those late 90s Buicks have some nice aerodynamics. I'm sure they're not perfect, but they do seem to cut through air quite nicely. I think you've got a good thing going with that luxury, power, and efficiency balance in a Park Ave.
The aerodynamics are good, and got even better when I raised rear 1". The positive 1" rake added another 2.5" to gas mileage at 70 mph. It is a sleek, good looking car.

I bought it for only $4500K with 50K miles on it. I put $2K into it mechanically fixing things (broken motor mounts, broken front electric seats, new shocks and srruts front and rear, tune up, new syn fluids) and a few $ for mods.

Best car I've ever owned. As close to perfect as it gets for the money.
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