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gas mileage
https://slantsix.org/forum/viewtopic.php?t=14747		 Page 1 of 2
Author:  gonescootin [ Wed Oct 19, 2005 7:45 am ]
Post subject:  gas mileage
Does anyone know how to improve the gas mileage on a 170 slant? Thx
Author:  SlantSixDan [ Wed Oct 19, 2005 8:32 am ]
Post subject: 
What model and year is your car? How many miles on it? Manual or automatic transmission? Rear axle ratio? What kind of driving do you do, mostly city or mostly highway? What gas mileage are you getting now?
Author:  Jeb [ Fri Oct 21, 2005 8:34 am ]
Post subject: 
Not trying to be sarcastic but drive 50-55 like I do.
Author:  slantvaliant [ Fri Oct 21, 2005 11:33 am ]
Post subject: 
The basics:
Go easy on the gas pedal, and on the brakes. Less acceleration.
Lighten up! Clean out the trunk, the back seat, etc.
Tuneup. No, a real tuneup. Use a tach, timing light, vacuum gauge, and all. Carb, choke, valves, distributor, spark plugs and wires.
Keep your tires inflated properly.
Check your brake adjustments.
Get a fresh alignment.

Then you start getting fancier.
Synthetic oil.
Electronic ignition.
Two-barrel carburetor.
Low restriction exhaust.

Go Crazy!
Crank scraper / windage tray.
Headers.
EFI.
Aerodynamic aids.
Fiberglass/Carbon Fiber body panels.

Notice that most of the changes to the car can also improve its performance.
Author:  64ragtop [ Sat Oct 22, 2005 2:41 pm ]
Post subject:  Cheapest mileage improver!
Duct tape a raw egg to your gas pedal. Then DONT BREAK THE EGG!!!
Author:  emsvitil [ Sat Oct 22, 2005 2:49 pm ]
Post subject: 
I'd need to have a hard-boiled egg...............

:lol:
Author:  argentina-slantsixer [ Sat Oct 22, 2005 3:07 pm ]
Post subject: 
Quote:
Not trying to be sarcastic but drive 50-55 like I do.
geez.... I wouldn't like to be your insurance company.... :lol:
Author:  mrbillohnooo [ Sat Oct 22, 2005 6:05 pm ]
Post subject: 
hard boiled? how about petrified?....
Author:  SlantSixDan [ Sat Oct 22, 2005 6:48 pm ]
Post subject: 
Quote:
Go easy on the gas pedal, and on the brakes. Less acceleration.
Lighten up! Clean out the trunk, the back seat, etc.
Tuneup. No, a real tuneup. Use a tach, timing light, vacuum gauge, and all. Carb, choke, valves, distributor, spark plugs and wires.
Keep your tires inflated properly.
Check your brake adjustments.
Get a fresh alignment.
All excellent advice.
Quote:
Then you start getting fancier
And you start having to do the maths to see how long it'll take the improved mileage to pay back your investment.
Quote:
Synthetic oil.
Electronic ignition.
Two-barrel carburetor.
Low restriction exhaust.
Well...sure, but I might quibble with that 2bbl carburetor. They make a nice driveability improvement, but mileage can go up or down, depending on a lot of different factors. It's possible to get much better mileage with a 1bbl than with a 2bbl.
Quote:
Crank scraper / windage tray
Really only worth messing with if the engine's being opened for another, more pressing reason.
Quote:
Headers
Not for a mileage improvement! Dutra Duals, yes. Headers, generally no.
Quote:
EFI
Mileage payback time measured in decades
Quote:
Aerodynamic aids
...such as a different car body...
Quote:
Fiberglass/Carbon Fiber body panels.
Not something I'd trust my safety to in a street-driven car.
Author:  Rust collector [ Sat Oct 22, 2005 6:58 pm ]
Post subject: 
I used synthetic oil in the tranny/rearend of a 74 dart, and had to hold the brakes on at traffic lights, so I think it would help a bit, and I don´t change that so often either...
Author:  SlantSixDan [ Sat Oct 22, 2005 8:02 pm ]
Post subject: 
Quote:
I used synthetic oil in the tranny/rearend of a 74 dart, and had to hold the brakes on at traffic lights
Having to hold the brakes on at traffic lights is normal regardless of engine oil, with an automatic transmission.
Author:  emsvitil [ Sat Oct 22, 2005 8:55 pm ]
Post subject: 
Quote:
I used synthetic oil in the tranny/rearend of a 74 dart, and had to hold the brakes on at traffic lights, so I think it would help a bit, and I don´t change that so often either...

I think the super slippery synthetic oil slipped out and got on the brake shoes, making super slippery shoes....................


:twisted:
Author:  argentina-slantsixer [ Sat Oct 22, 2005 9:42 pm ]
Post subject: 
hehee the holding the brake at the stop light is killer! that would not only save you some mpg but some tickets too.... imagine this: you switch to synt and then you get a ticket for invading the pedestrian crossing lane.... :lol:

sorry, I couldn't help

slant slant

mopar 225

dodge chrysler

(sorry, I suffer from Slanturrettes)
Author:  slantvaliant [ Sat Oct 22, 2005 10:17 pm ]
Post subject: 
Quote:
And you start having to do the maths to see how long it'll take the improved mileage to pay back your investment.
Assuming your doing it for purely economic reasons, true. Range is also a consideration, as is just having made a measurable improvement in one's car. And, remember, some of these items in the fancier group can be done very inexpensively, depending on your situation.
Quote:
Headers, generally no.
True only in that headers are generally made for increased power, with compromises made for convenience. The right set of headers or manifold, exhaust pipes, and muffler can improve fuel efficiency. Finding or making the right system for fuel economy isn't easy, and few bother. Again, this is "getting fancier"
Quote:
something I'd trust my safety to in a street-driven car.
Quote:
Really only worth messing with if the engine's being opened for another, more pressing reason.
Hence the "Go Crazy!" subheading.[/quote]
Author:  Rust collector [ Sun Oct 23, 2005 8:44 am ]
Post subject: 
Ok, it was a manual 3 speed ok, and if the ground was about flat, I didn´t have to hold the brakes on before I changed to synthetic oil...IN THE TRANNY AND REAREND, the engine got old dinos in it...

Soooo, I guess it makes for less friction, and a bit of mileage :?
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