Fuel Booster?
|
Re: Fuel Booster?
<mmdir2005@yahoo.com> wrote
> http://www.mpdirect.com/index.asp?Pa...23&dc=mpgoogle > > Is this some kind of joke? I'd say it's some kind of snake oil, yes. Raising octane has to do with reducing engine knock. If this stuff really raises the octane, and you have engine knock, then fuel efficiency may improve. If it cleans the fuel system, that might help fuel efficiency, too. Otherwise, I doubt it will help fuel mileage. All I do these days for the fuel system is change the fuel filter regularly and add a $6 bottle of Chevron Techron to the fuel tank, per the bottle's directions, once a year. It's supposed to keep the injectors etc. clean. (Some add this every oil change.) Dunno if it makes a difference, but some folks here suggest it does. My 1991 Civic is getting up there in years, and some parts about which the typical "trade my car in every five years" owner need not concern him/herself, are getting a bit mucky. Hence my attempts at prevention of the muck. Still getting 40+ mpg most of the year, so I can't complain. |
Re: Fuel Booster?
I don't know how your 91 civic could reach 40+ mpg. No matter how good you maintain your car, 90 civic can't reach more than 35mpg. |
Re: Fuel Booster?
mmdir2005@yahoo.com wrote:
> I don't know how your 91 civic could reach 40+ mpg. No matter how good > you maintain > your car, 90 civic can't reach more than 35mpg. Well guess what? Hers can get 40mpg. It depends on your driving habits. EPA rated the 1990-93 Accord at 28mpg on the highway, but I consistently get 32-34mpg on the highway with my '93. And it's an automatic. |
Re: Fuel Booster?
You're mistaken. There are many reports on groups.google of early 90's
Civics (1.5 Liter, no air conditioning, manual transmission) reaching 40+ mpg. I checked. In addition, since someone else challenged me on this a while back, I have kept careful records for the last year of each fillup (almost alway over 8 gallons) and the mileage. <mmdir2005@yahoo.com> wrote > I don't know how your 91 civic could reach 40+ mpg. No matter how good > you maintain > your car, 90 civic can't reach more than 35mpg. > |
Re: Fuel Booster?
Elle wrote:
> You're mistaken. There are many reports on groups.google of early 90's > Civics (1.5 Liter, no air conditioning, manual transmission) reaching 40+ > mpg. I checked. In addition, since someone else challenged me on this a > while back, I have kept careful records for the last year of each fillup > (almost alway over 8 gallons) and the mileage. > He's going by EPA's estimates. EPA rated the 4th-gen Civic LX 5-speed at 35mpg on the highway. I find that although EPA may overestimate mileage on some cars, they tend to underestimate mileage for Hondas. As I said before, my '93 Accord (automatic) gets much better highway mileage than EPA estimated, and I have seen many posts from others who get similar mileage. |
Re: Fuel Booster?
"High Tech Misfit" <me@privacy.net> wrote
> Elle wrote: > > > You're mistaken. There are many reports on groups.google of early 90's > > Civics (1.5 Liter, no air conditioning, manual transmission) reaching 40+ > > mpg. I checked. In addition, since someone else challenged me on this a > > while back, I have kept careful records for the last year of each fillup > > (almost alway over 8 gallons) and the mileage. > > > He's going by EPA's estimates. EPA rated the 4th-gen Civic LX 5-speed at > 35mpg on the highway. I find that although EPA may overestimate mileage on > some cars, they tend to underestimate mileage for Hondas. As I said before, > my '93 Accord (automatic) gets much better highway mileage than EPA > estimated, and I have seen many posts from others who get similar mileage. Sure. I also agree with you that driving habits play a role. The EPA tests on a treadmill, too, right? Maybe it simulates hills, but it's still not as though it duplicates my driving habits and terrain. Plus I have a vague recollection of some chatter on the net about EPA testing being done only on young cars. I suspect there is some "break-in" that occurs that, with a properly maintained vehicle, will result in higher mileage from, say, 100k miles to 200k miles, vs. the fuel mileage pre-100k miles or so. For several months recently I was doing a lot of coasting on (not steep, not very long) hills, letting the RPM drop to idle, thinking I was saving gas. But I read here that the engine control system does xyz in idle which is not as efficient as keeping the RPMs higher (using engine braking) on a hill. Plus, in the last few months I also strive to keep the RPM under 3000 at all times (which means on the highway, I'm limited to about 65 mph, tops). These seem to have helped. I will continue the experiment and see if I can build higher statistical confidence in this theory with more data. For the record, I only started adding Chevron Techron last year, around 15k miles ago. It's really a gamble, but I figure it could not hurt. Perhaps my biggest motivation for adding it is that I had a severely plugged PCV valve (the original one, never been touched before) in 2003. Replacing it made a 10-15% difference in mileage, consistent with discussion on the net and in Chilton's manuals. Now I inspect it every oil change and spray some PB Blaster into it. I plan to replace it every so often, like every seven years. If my car lasts that long. I have always been religious about oil changes. Did them at 3k-4k miles/6 months for years but switched to 5k miles/6 months around 2000. Stayed on top of air filter, fuel filter, coolant, plug and wires, and timing belt changes, too, per the maintenance schedule. Always used unleaded regular gas. |
Re: Fuel Booster?
Elle wrote: > "High Tech Misfit" <me@privacy.net> wrote > > Elle wrote: > > > > > You're mistaken. There are many reports on groups.google of early 90's > > > Civics (1.5 Liter, no air conditioning, manual transmission) reaching > 40+ > > > mpg. I checked. In addition, since someone else challenged me on this a > > > while back, I have kept careful records for the last year of each fillup > > > (almost alway over 8 gallons) and the mileage. > > > > > He's going by EPA's estimates. EPA rated the 4th-gen Civic LX 5-speed at > > 35mpg on the highway. I find that although EPA may overestimate mileage > on > > some cars, they tend to underestimate mileage for Hondas. As I said > before, > > my '93 Accord (automatic) gets much better highway mileage than EPA > > estimated, and I have seen many posts from others who get similar mileage. > > Sure. I also agree with you that driving habits play a role. The EPA tests > on a treadmill, too, right? Maybe it simulates hills, but it's still not as > though it duplicates my driving habits and terrain. > > Plus I have a vague recollection of some chatter on the net about EPA > testing being done only on young cars. I suspect there is some "break-in" > that occurs that, with a properly maintained vehicle, will result in higher > mileage from, say, 100k miles to 200k miles, vs. the fuel mileage pre-100k > miles or so. > > For several months recently I was doing a lot of coasting on (not steep, not > very long) hills, letting the RPM drop to idle, thinking I was saving gas. > But I read here that the engine control system does xyz in idle which is not > as efficient as keeping the RPMs higher (using engine braking) on a hill. > Plus, in the last few months I also strive to keep the RPM under 3000 at all > times (which means on the highway, I'm limited to about 65 mph, tops). These > seem to have helped. I will continue the experiment and see if I can build > higher statistical confidence in this theory with more data. > > For the record, I only started adding Chevron Techron last year, around 15k > miles ago. It's really a gamble, but I figure it could not hurt. Perhaps my > biggest motivation for adding it is that I had a severely plugged PCV valve > (the original one, never been touched before) in 2003. Replacing it made a > 10-15% difference in mileage, consistent with discussion on the net and in > Chilton's manuals. Now I inspect it every oil change and spray some PB > Blaster into it. I plan to replace it every so often, like every seven > years. If my car lasts that long. > > I have always been religious about oil changes. Did them at 3k-4k miles/6 > months for years but switched to 5k miles/6 months around 2000. Stayed on > top of air filter, fuel filter, coolant, plug and wires, and timing belt > changes, too, per the maintenance schedule. Always used unleaded regular > gas. +++++++++++++++++++++++++++ I found the device at this link <http://www.ggimages.com/rx7/pwm.html> to be a very nice additon. I had to build 2 because my Civic has DPFI, and you have to monitor both the primary and aux injector. It was very educational to see just when the primary and aux opened. I found that keeping the engine RPM low helped most of the time, but at times it was better to downshift and run at higher RPMs. Very counter intuitive. If you shop around you can build the whole thing for less then $10 a channel. For a multiport, IE 4 injectors, just monitor one, the ever so slight error is not worth another $30. Terry |
All times are GMT -4. The time now is 08:35 AM. |
© 2024 MH Sub I, LLC dba Internet Brands