Being a mechanically inept collegebound student, I'm all about FE without mechanic work.
So awhile back, I came across the topic of adding acetone to regular fuel for increased horespower as well as FE. I'm not sure about long term effects (if there are any), but I was curious whether or not others here are using it as a solution to rising gas prices. I didn't see it on the front page of this forum at least.
Here's the best numbers I have.
1998 Jeep Grand Cherokee, 4WD, 6 cyl
EPA Mileage: 15/21/17
Regular mileage - 13 mpg (mountainous two lane roads - is that city or highway?)
Trip: 300 miles
225 miles interstate highway - speeds of 70 - 77 mph
25 miles city
50 miles mountainous/hilly 4 lane highway - speeds 60/65
FE - 22 mpg
I don't have the money for a ScanGauge, so I did it the old fashioned way. Not too bad on a long road trip though. Horrible vehicle to take across state, but I just didn't have confidence that the metro we saved from the crusher would make it. lol.
Any other data/comments/insight on this is highly welcomed.
The oil was changed in it just a few hundred miles prior to the trip. For a full tune up, I can't say. It's not my car, it's my parents, and my dad usually keeps a check on everything and changes it when needed. My grandpa is a mechanic, and my dad is good with cars (not a trait that has been passed on to me unfortunately).
Actually, I just realized, a smaller portion of that is interstate that I put down. I'll edit that out, but actually 50 miles of that was 4 lane mountainous highway, so the FE is better than I initially thought.
On the rolling hills part of the interstate (the bulk of the drive), the hills were nothing too big. I had the car on cruise control for most of the drive, and the tach never changed much. The car didn't downshift for any of the hills either, so I assume it didn't take away much from the FE.
As for driving slower.. the trip was 340 miles (300 from where I fueled up and started tracking it). It took 5 hrs 15 minutes as it was. 55 mph on the interstate, and I'd be driven over (which is part of the reason I didnt want to take the Metro. The engine sounds overly taxed at just 60).
I might crack open my can of acetone again. May as well use it as it's just going to sit in the garage anyways. I wish there was a practical way to A-B-A experiment with it. Maybe I should get dual tanks in my Metro (jk).
I took my Geo to 84 mph a couple of days ago (hopefully nobody from team "Feast and Famine" is reading this) and my car was at a flat 30mpg at that speed. Of course I EOC'd back down to 45 mph to soften the blow to FE .
I wish there was a practical way to A-B-A experiment with it.
I was just thinking about that today... It's actually funny - just the other day a friend of mine brought up acetone and how it really bothered him... Every time gas goes up 20-30 cents, a question about acetone comes up :P
But here's the rub... if the benefits are small enough that it's difficult to tell the difference between tanks - even multiple tanks - it would seem logical to say that acetone is not cost effective :/
I think a more proper test would include:
1. Baseline - FE before acetone
2. Add acetone to first tank
3. Acetone second tank - record change
4. Acetone third tank - is FE change still there?
5. Acetone 4th tank - FE change still there?
6. Acetone 5th tank - FE change still there?
7. No acetone next tank - FE must change to verify results
8. No acetone next tank - did FE stabilize?
The reason for so many tanks? If you're getting gains by cleaning out your fuel system - that's not because of chemical magic, that's just poor maintenance on your part. So those 5 tanks of acetone would hopefully give a trend and might possibly show that it was your internals being cleaned rather than chemistry :P
But - weather is an issue (this takes quite a bit of time), especially for those of us that use human powered transportation :P Now for someone that's on the road a lot
Personally -- that's a lot of testing to prove something that yields small results. I mean, if the results were significantly large, we'd all be doing it :P And an oil company would likely pick it up. Imagine if BP could claim their fuel gets you 20% better FE - imagine the lines at their stations :P
Time is the best teacher. Unfortunately it kills all its students.
I have been using/testing acetone for about 3 years now. It does work in some cars and not in others. I don't know why, something to do with engine design and or ECU programing.
FYI, adding a couple of ounces of acetone to a tank of gas won't clean anything. Thats like adding one drop of soap in a big laundry tub.
You will need to add at least 1 ounce per gallon of whatever cleaner to do any good.