Tacoma MPG Dropped

Asked by Feb 06, 2016 at 01:31 PM about the 2004 Toyota Tacoma 4 Dr Prerunner V6 Crew Cab SB

Question type: Maintenance & Repair

Tacoma only has 91k miles on it. 16 gallon tank. It IS 11 years old, but for
the first 9 years or so, I was always getting 365-385 miles per tank, now I'm
barely getting 330 miles. (I measure at every fill up. OCD :))  Isn't that a big
drop within the last 18 months or so? Similar driving styles, always the
same Michelin tires. Things I have done to the car. -basically all stock
besides K&N Filter which I clean every 20k miles -Replaced Denso 02
Sensor with like kind -Always mobil1 5w-30 Synthetic, with Toyota Filter -
Replaced SP with Factory Spark Plugs - Replaced with Toyota Brakes
-80% of the time I use Chevron Gas -Replaced Front Shocks/Struts(I forget
what they are) -Replaced waterpump and timing belt -Did Seafoam once
like 20k miles ago. 1/3rd in crankcase, 1/3rd in gas tank, and the rest up
the vacuum line.   That's about all I've done to this car since its very
reliable. Just can't figure out why the mileage dropped so much  Thanks!!

2 Answers


How is the oil consumption? check/replace the plugs if they show Oil, carbon or signs of weak combustion~ set the timing to the most efficient (nearly knockin') spot...never trusted seafoam, perhaps it is just fine, but anything other then the correct lubricants seems incorrect...in my humble opinion~ changed all filters, combustion seems okay...emissions are satisfactory...would have to suggest that you increase the timing till knock~....then back off a scoach~ just one man's opinion~


You may want to run a check of the computer settings (national auto stores can read the codes for you) Also depending on your part of the country you're in, the new blend of gas with ethanol as mandated by the Federal Government and/or your State may have an effect. Have you changed your usual driving routes? (ie new route to work, more highway than before? more surface street? ) started to keep up with the traffic instead of driving by your speedometer? Heck, I don't know, but just throwing out some variables incase something clicks. Good Luck with this.

1 of 1 people found this helpful.

Your Answer

Toyota Tacoma Experts

  • #1
    Tom Demyan
  • #2
  • #3
View All

Related Models For Sale

Used Toyota Tundra
566 Great Deals out of 37,256 listings starting at $1,500
Used Nissan Frontier
349 Great Deals out of 24,549 listings starting at $1,200
Used Ford F-150
2,558 Great Deals out of 220,223 listings starting at $1,222
Used Toyota 4Runner
303 Great Deals out of 30,850 listings starting at $2,595
Used Chevrolet Silverado 1500
2,199 Great Deals out of 151,084 listings starting at $1,499
Used Chevrolet Colorado
301 Great Deals out of 43,231 listings starting at $1,900
Used GMC Sierra 1500
887 Great Deals out of 59,331 listings starting at $1,980
Used Ford Ranger
119 Great Deals out of 4,676 listings starting at $1,495
Used Jeep Wrangler
305 Great Deals out of 20,114 listings starting at $2,900
Used GMC Canyon
131 Great Deals out of 15,187 listings starting at $2,500
Used Dodge Ram 1500
327 Great Deals out of 9,602 listings starting at $800
Used Toyota Camry
807 Great Deals out of 71,840 listings starting at $175
Used Nissan Titan
259 Great Deals out of 22,352 listings starting at $1,995

Used Cars For Sale

2018 Toyota Tacoma For Sale
20,210 listings starting at $22,988
2017 Toyota Tacoma For Sale
41 Great Deals out of 5,770 listings starting at $13,995
2016 Toyota Tacoma For Sale
59 Great Deals out of 2,675 listings starting at $17,993
2015 Toyota Tacoma For Sale
61 Great Deals out of 2,595 listings starting at $11,500
2014 Toyota Tacoma For Sale
33 Great Deals out of 1,316 listings starting at $8,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.