Realistic Thoughts on Improving Your Car’s MPG

There has been a lot of talk about acetone and mixing it with your gas when you fill up. The general consensus is that adding 3oz of acetone per 10 gallons of gas is the ideal mixture. I have used acetone with different results and I have pretty much came to the conclusion that a properly tuned and maintained car will see no improvement with adding acetone to your tank. But the only real way to find out is to run it for a few tanks and see what happens. Typically it makes a good fuel system cleaner so it is worth using occasionally anyway. Once you start using it the first tank will normally be a bit worse mileage if your fuel system isn’t clean. On the third tank is where I would decide whether I would continue using it. After the third tank you could run 2 tanks without it and see if your mileage drops back down. It could be that the acetone cleaned your fuel system and now that it is cleaned the acetone is no longer needed. If the car is not tuned properly from the factory the acetone can improve mileage under the right circumstances so if it works for you then by all means continue using it. It will not damage the car in any way when used in the 3oz per 10 gallon range.

Next up is water injection, I am not going to explain how to build it, there is a detailed article on the mother earth news website for how to build it. Water injection works and if tuned properly to use 1 gallon of water for every 10 gallons of gas used it will help your mileage by about 3-5%. I recommend using windshield washer fluid instead of water. It gives a slightly better gain. The hard part is keeping the fish tank regulator adjusted so it mixes properly. Also make sure it is using a ported vacuum source or it will idle really badly. I gave up running it because it wasn’t worth the hassle on my car trying to remember to keep the small jug I was using full and keeping it properly tuned.

There are other modifications you can make, advancing your cam timing can help improve mileage but it will make the engine have less power. If you have a distributor you can advance the base timing slightly and improve the mileage. If you ever have the oil pan off adding a crank scraper and windage tray helps at the higher RPMs. You can shave the head slightly and add Singh groves to the combustion chamber. Changing your differential gearing to a taller gear helps mileage as well as going to a taller and narrower tire. Both of those can throw your speedometer off so don’t do them unless you are prepared to deal with that.

There are a lot of things you can do to improve your mileage, it is just a question of how much you are willing to give up in your car. You can’t get better mileage for nothing, so after reading this article it should give you some ideas on what you can do. There are a few websites that are good to help give you ideas on getting better mileage. Gassavers.org is probably the best one around so look around there if you want to learn more. You can also look at what I have done to my Metro XFI for some additional ideas.

Pages: 1 2

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Realistic Thoughts on Improving Your Car’s MPG

There has been a lot of talk about acetone and mixing it with your gas when you fill up. The general consensus is that adding 3oz of acetone per 10 gallons of gas is the ideal mixture. I have used acetone with different results and I have pretty much came to the conclusion that a properly tuned and maintained car will see no improvement with adding acetone to your tank. But the only real way to find out is to run it for a few tanks and see what happens. Typically it makes a good fuel system cleaner so it is worth using occasionally anyway. Once you start using it the first tank will normally be a bit worse mileage if your fuel system isn’t clean. On the third tank is where I would decide whether I would continue using it. After the third tank you could run 2 tanks without it and see if your mileage drops back down. It could be that the acetone cleaned your fuel system and now that it is cleaned the acetone is no longer needed. If the car is not tuned properly from the factory the acetone can improve mileage under the right circumstances so if it works for you then by all means continue using it. It will not damage the car in any way when used in the 3oz per 10 gallon range.

Next up is water injection, I am not going to explain how to build it, there is a detailed article on the mother earth news website for how to build it. Water injection works and if tuned properly to use 1 gallon of water for every 10 gallons of gas used it will help your mileage by about 3-5%. I recommend using windshield washer fluid instead of water. It gives a slightly better gain. The hard part is keeping the fish tank regulator adjusted so it mixes properly. Also make sure it is using a ported vacuum source or it will idle really badly. I gave up running it because it wasn’t worth the hassle on my car trying to remember to keep the small jug I was using full and keeping it properly tuned.

There are other modifications you can make, advancing your cam timing can help improve mileage but it will make the engine have less power. If you have a distributor you can advance the base timing slightly and improve the mileage. If you ever have the oil pan off adding a crank scraper and windage tray helps at the higher RPMs. You can shave the head slightly and add Singh groves to the combustion chamber. Changing your differential gearing to a taller gear helps mileage as well as going to a taller and narrower tire. Both of those can throw your speedometer off so don’t do them unless you are prepared to deal with that.

There are a lot of things you can do to improve your mileage, it is just a question of how much you are willing to give up in your car. You can’t get better mileage for nothing, so after reading this article it should give you some ideas on what you can do. There are a few websites that are good to help give you ideas on getting better mileage. Gassavers.org is probably the best one around so look around there if you want to learn more. You can also look at what I have done to my Metro XFI for some additional ideas.

Pages: 1 2

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