Have you guys actually had any aftermarket products increase miles per gallon (air intake, TB spacer, etc)? Every product I look at claims to increase MPG, but i figure i'd ask the people who use them. Thanks
thats weird fox, i go the same junk.. bored out throttle body, 3" air intake, catback.. last winter stock i got 180-190 a tank before the gas light turned on, this year after the mods i'm getting 230-240 before the light turns on.
Soon i will be getting a new front bumper to try my "aero dynamic" idea..
trip is trippin.. I cant believe it either.. anyone used seafoam or any gas cleaner with good resaults.. I even tried inflaiting my tires to 40psi stil nothing, but a stiff ride. I get 190-200 before the light turns on.. calculated to about 12-13-14.5 max. never 15..
I calculate it from my trip miles and divide it to how many gallons I pump to a full tank (for the slow peeps).
We just bought a 97ZJ Laredo last month, 4.0, auto, 242, 3:55 gears, it was getting 8-10mpg, noticed in the colder weather it was not heating up right, replaced the thermostat with a stock one, the old one came out in 3 pieces, went up to 19 around town and 22-24 on the hiway. Also pumped up the tires to 35psi. Will be doing a tune up on it once it warms up a bit more. But the low temp never let the engine come out of cold loop, when I put the chrysler scanner on it and looked that error was repeated multiple times. If you put a lower temp tstat in there to help it run coolerl, don't, change it back. I also just ran a couple of bottles of Chevron Techron fuel system cleaner thru, 20oz bottles and it's running smoother now. Changed all the fluids to mobil-1, engine, TC and diffs, leaving the tranny alone for now.
Toby i think someone is pulling your chain, messing with the o2s with a resistor will do nothing but set off an engine light and put his truck into dummy mode. going from 10mpg to 46mpg is a far stretch. what kind of gmc is he running, truck car???
a 3/4 ton v8 gasser getting upwards of 46mpgs.... dude come on.... im not gonna argue, if hes getting that then thats awsome.
my 1/2 ton gasser sometimes hits close to 20mpg if im lucky with a tail wind behind me.
tell him to reset his odometer, next time he fills up. then at his next fill up, divide the miles by gallons added.
dode you know what the cheap 5 bucks resistor mod does? It makes the engine think the air getting in is "colder" so the engine adds more fuel. I gotta say thats impossible to gain 10-15 mpg with a resistor that puts in more fuel.
I drove the freakin thing. his odo was a 73.5 miles for the trip, and the fuel used was at 2.1g. The whole trip was at optimum rpm, but still. I drove it at 55 down vinyard for 10 min, and it read between 42 and 30 the whole way, except take off. I peeled out.