sudden drop in mpg???

I go on Vacation to Virginia several times a year. I'll inflate to 50 front 48 rear. The roads in VA are so smooth. (at least they are everywhere between Richmond and VA Beach.) Something that you may not have thought of is that you may be due for a tank of Fuel injector cleaner. Go to advance autoparts, autozone, or wal-mart and pick up a bottle of the Chevron w/ techron fuel injector cleaner and dump it in the gas tank. I use this product every about every 10,000 miles and I have always seen an immediate increase.

 

I recently had my fuel injectors cleaned at the dealer. Saw and immediate increase in mileage back to what I got in the beginning. Certainly try the fuel injector cleaner at the parts dealer first......

 

I agree with both Morpheusx and Hobba. Get the fuel injectors clean. There are plenty of folks who run higher tire pressure (myself included). What you need to understand is that when you inflate over recommended tire pressure you give something up (ie. handling, ride, braking, safety). For that reason most would not recommend someone run higher than recommended tire pressure.

 

Since you mentioned that you recently had the oil changed, the first thing I would do before anything else, is check to make sure they didn't overfill the oil. It should NOT be above the upper mark on the dipstick. This condition is a known mpg robber.

 

Yes, check the oil level.

Think twice about inflating above the max pressure given on the side of the tire (44 PSI for the original tires). But going up to that point is inarguably safe and will help MPGs. Note that the ride and handling will change.

What kinda crappy gas do some people get such that they need injector cleaner? I use Shell E10 and never have any trouble.

 

Beyond the good advice given by others, consider that Virginia temps have been below normal the last few weeks. Mid-40s for someone with normal driving conditions in our recent weather still is reasonable -- though there is room for substantial improvement.

Where are you in VA? If you're near Richmond, I don't mind meeting with you to give you an in-person assessment and hands-on clinic.

 

I highly recommend the ScanGauge. In addition to helping you maximize fuel economy by seeing better what's happening beneath the hood, it also has a variety of trip gauges and will display diagnostic trouble codes. And it's plug and play, requiring no installation and, therefore, making it easy to move between cars.

 

I second Jim's recommendation on the Scangauge. One of the gauges he mentioned was coolant temperature which can be useful in knowing where you are in the warm-up stages(S1-S4) so you can take full advantage of them.

 

Hello all. New member here. I actually found this thread via a Google search. I have seen a recent (last 2 weeks) drop off in mileage as well (from about 47ish to 41 and even as low as 39 on my latest tank).

I live in Midlothian, Va. (a suburb of Richmond, Va.) and temps have been considerably colder than normal. This is the only intervening variable I can think of...

 

That's a normal drop in cold weather. It's -8°F (-22°C) here at the moment, so consider yourself lucky.

Tom

 

Hey, welcome from one of your neighbors (off Providence Road near Midlothian Tpk.)!

I'll make the same offer to you as I did previously to Fikey13: A hands-on clinic. I can show you how I get 60+ MPG even in our recent weather.

 

I'm in Brandermill. Might take you up on that. However, the mileage is mostly due to my wife getting her hands on the car so often . I can keep it in the 50's pretty consistently.