Yeahhh last tank i was got 12.5 mpg and i didnt do anything to the engine. I recently have been getting bad gas mileage but i aint running around town flooring it , i do alot of high way driving so I was wondering things i should look at before I have someone else take a look at it. I can do almost anything a mechanic would be able to do but I just cant figure out what might be broken. I dont have a check engine lite.

 

If its a 3.0 sounds normal to me....here is what I have done to my truck and I was getting 11 to 12 MPG.

1. Changed HG
2. Dynomax 21/4 exhaust....new cat also
3. Timing belt, water pump, idler pully, tensioner
4. sparkplugs, cap & Rotor, new wires
5. Fuel filter
6. O2 sensor (Denso)
7. Brakes
8. Tranny fluid, both diffs, trans case
9. Anti freeze flush
10. cleaned Throttle body
11. Tires at 38 psi
12. changed to Mobil 1 synthetic...engine fluch
13. new airfilter
14. PCV valve
15. front end alignment
16. new tires
17, all new drive belts
18. Getting rdy to put on manual locking hubs, new rotors, rebuilt brake calipers..one of mine are sticking
19. also lube drive shaft and all other lube points

This was all done in the last 2 months.....Do you want to know what my MPG is now.....11 to 12 MPG.....

 

I get 15 in stop and go city driving, real crappy driving. On the highway 21 MPG at 75 MPH. I use maintenance dose of fuel additives every other tank, 1.5 oz. to 10 gallons.

The government changed the fuel requirements so we are all getting 5-10% drop in MPG. Isn't it great that we get gouged for a .55 cents a gallon tax and its compounded by higher prices and poorer quality.

 

I used to get 16 city/4x4 and 19 highway with my 89 3.0 with stock tires. I replaced my O2 sensor on my 91 4runner and picked up 2 mpg FYI so you might consider that. It had 150K miles on it and I was reluctant to drop the $150 but I think it has paid for it's self already.

 

What air pressure are you running with in your tires? How does the air filter look?

 

okay hereeeee we go

I recently did wire and plugs,injector cleaner,o2, air filter, fuel filter. I just finished the o2 today, the bolts that hold it on were soo rusted and heatted to death. So I dont know if it improved anything yet. Is there anything I am missing