Dear All,

i have a 06 GS300 RWD, 95k miles, 18" rim, tire: 245/45/ FR / 255/45/ RR.

i also have a DC short ram intake, car is lowered slightly about an inch all around.

reguarily oil change and maintenece, and i drive mostly speed at 40 mph on the streets.

above is about all mods i've done, but i am getting 13MPG in city, that is really bad, and before the intake, it was about 16 MPG city.

i thought by changing the intake would give me a little better MPG, but seems like it did worse.

Does anyone know anything i can do?????

 

there is so much that contributes to MPG it would be hard to pin point. 13 does seem extremely low, even with a heavy foot you should still be at about 17-18mpg.

 

Depending on what kind of mechanical ability you have, I'd check the spark plugs.
If they have not been changed, that could be a factor. I've seen short rams that actually make cars run worse, might want to put the stock intake back to see if it was the source of your issue.

Make sure your tire pressure is adequate as well.

 

thats very low, I do half city/half highway driving and this I am getting 24-26mpg on average. do a tuneup, new sparkplugs/fluids and see if it gets better


gs300 rwd:

 

Wow...that's very low. I could have a lead foot on my 350 and still got above 20.

Along with the plugs, check that the air filter isn't clogged. Also check tire pressure. All three are big factors.

 

What kind of fuel are you using? Take a look at the pump next fill-up and see what % ethanol is being added. I have a 102k 06, I've always run 87 w/ 10% ethanol that the refinery bastards force on us. I average 18-20 mpg in mostly (spirited) city driving. Original plugs but peeping for major service in a couple of weeks.

 

I believe gas companies change the formula of their gas to cope with the winter season, and the gas does not last aslong as summer gas. I believe they call it winter blend

 

This is true.