Cadillac SRX First Generation Forum - 2004 - 2009 Discussion, 2004 SRX V6 AWD poor MPG in Cadillac SRX Forums; My 2004 V6 AWD SRX has started to get real bad gas mileage within the past 6 months. I use ...
Is your air filter clean? Could it be Winter gas causing the mileage to go down? I'm surprised you get the mileage you posted. Especially with the AWD models having the 3.91 gears. 15-22 is pretty good.
I'd take it in for a diagnostic if you can rule out the gas being the issue.
have you used gas that contains no ethanol?
Automobile(s): 2007 SRX4 N*, 2004 Infinity G35 Coupe
Re: 2004 SRX V6 AWD poor MPG
I need to go back and see what the ethanol content is up my way. It was 10% by volume as printed on the pump a few weeks ago, and ethanol by definition provides poorer gas mileage. I agree with the others. Try the easy stuff first.
The gas: 87 is regular, not midgrade, the lowest octane available in my neck of the woods, and is the grade you are using. 89 is midgrade. And my V8 recommends 93 though it can run on a lower octane, pretty sure. Using a higher octane than what is recommended will do nothing to increase fuel economy.
The lower tire pressure, a dirty air filter, and cleaner injector will all contribute marginally to fuel economy.
Put those five things together and you may be relieved within a week! Then the mileage will put you with the rest of us......the SRX is no Honda Civic, a thirsty beast.
With all 3 of my SRXs low tire pressure will kill gas mileage. easily a 1mpg loss if they are ar 26 lbs or so. My last 2 SRXs were delivered with less than 27lbs of air. One of them i drove for several months with the pressures like that.
Took one of them on the tail of the Dragon and was wondering why it was understeering so much. LOL.