Hi,

I recently picked up my 99 AV6 cpe. Its completely stock. Before my oil change i was getting about 27 mpg pure highway driving, and about 22 mixed highway/city. Then i got my oil changed about 2 weeks ago. From then on, my MPG dropped to about 15 mixed highway/city. What the hell did they do to my car, im guessin they used the wrong weight oil? Any other suggestions on ways to improve my MPG. The car has 55k on it. Do the infamous bad tranny's have anything to do with the MPG as well, because ive been getting a lot of rought downshits.

 

Check to see if any vacuum lines were disconnected in error or possibly broken. Maybe even vacuum lines that were disconnected and reconnected incorrectly.

 

ill check that, any other ideas?

 

the wieght of the oil could be your problem. If you are using 5/20 and they put in like a 20/50, it will deffinatly drop you mpg.

 

did you fill up after the oil change? it could possibly be just some bad gas from that particular gas station.

 

it was the same gas.

 

anyone else?

 

Maybe you have coincidently started dragging brakes?? Has to be some other system taking a ****...fouled your plugs? air fuel mix went to hell? checked your tire pressure

driving habits changed?? lol...
Hope you get it figgured out dude...
sohc

 

I'm assuming you've thrown no check lights?

 

I bet they over filled the oil and your crank is having to slosh through the excess oil in the pan.

Have it changed again by a different shop and see if it goes away.

 

no cels, car seems to be running just fine, but the mpg is horrible

i think i may fork out the 35 bucks for a oil change from honda

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by UCBGSR &raquo;</TD></TR><TR><TD CLASS="quote">no cels, car seems to be running just fine, but the mpg is horrible

i think i may fork out the 35 bucks for a oil change from honda</TD></TR></TABLE>

who did your oil change then..?

 

just a local shop. Second thought, perhaps I should start doing it myself.

 

you might need to go back to them and make them do a check all over for free.

That is a lot of gas milage dropping
damn from 28 to 15 man u need to double your gas from now on