Last post on Jul 22, 2010 at 9:24 AM
You are in the Acura RDX
What is this discussion about?
Acura RDX, SUV
#21 of 55 Re: MPG Test Drive [newdriver2]
Jul 22, 2007 (3:50 pm)
I just got back from a 2 week, 3000 mile road trip with my RDX. I averaged 24mpg for the whole trip. That includes lots of mountains, winding coastal roads, etc. In flatter areas, I was getting 450 miles per tank of gas (about 27mpg) with the cruise control set at 75mph.
Lots of cold starts, stop-and-go traffic, and fast acceleration will reduce your mileage significantly.
#22 of 55 Manhatton Millage
Jul 24, 2007 (9:46 am)
Does anyone live in Manhatton, NY and have the actual MPG want to share? Or any people only use the RDX for city use only and have the actual MPG. I travel a lot in NY City and want to know the MPG before buying it, thanks.
#23 of 55 Re: Manhatton Millage [newdriver2]
Jul 25, 2007 (2:04 pm)
City driving MPG depends a lot on how long your trips are. All gasoline engines are inefficient until they warm up. If many of your drives are only a few miles after a cold start, then your mileage will be terrible in any car (and worse in a heavy car). The RDX is lightweight for an SUV, but heavy compared to a 4 cylinder sedan. On the other hand, if you only drive a few miles a day, then you aren't going to be burning much gas anyway.
#24 of 55 premium fuel
Jul 26, 2007 (3:12 am)
does anyone know if using reg gas will damage the engine, or create any other problems? I saw on Acura's website that they prefer premium fuel but that you can use reg....is there a downside to this?
#25 of 55 Re: premium fuel [frog22]
Jul 27, 2007 (8:37 am)
Yes, you must use premium. You can put the cheaper stuff in every once in a while, but long use of <91 Octane will damage the engine. I have had my RDX for 2 weeks and am getting 23.9 MPG for highway and city. I don't engage the turbo too much and use the AC in the afternoon/evenings. However, I also live in Florida so I don't deal with mountainous terrain. Take it easy on the pedal and avoid the hard brakes and you should get 380-420 miles per tank. Good luck!!
#26 of 55 Re: premium fuel [ringz]
Jul 30, 2007 (9:16 am)
Just to give a little more info about using premium fuel. Acura says that the care is tuned for premium but you can use other levels. For the TL, TSX even the MDX this would be ok. It is the Turbo in the RDX that makes you use the premium. It is all related to the Compression Ratio. Most cars will be around 8:1 and they run regular. The RDX says it has a ration of 8.8:1. Most high performance cars that need premium are around 10:1. If you did not use the turbo in the RDX at all you would be ok with a lower octane. However you will get better milage with premium. To restate frog22 "You can put the cheaper stuff in every once in a while" if you have to but best for the engine to keep with the premium.
#27 of 55 Queastion about RDX
Jul 31, 2007 (5:37 pm)
I know the Max. Towing is 1500 Lbs for the RDX but does anyone know how many Lbs the RDX could carry with inside. I heard the Turbo Engine couldn't carry much heavy stuff. Is that true? I like the car but never have any idea about Turbo Engine. The mileage for 2008 RDX is 17/22 which is really close to the MDX, why Acura will use the 4 cyc. instead of v6 if they get the same mileage? What is the advantage and disadvantage for the turbo engine?
#28 of 55 2008 Mileage with regular gas
Feb 09, 2008 (6:12 pm)
I was at the dealer today asking about having to use premium
I know a sales guy will say whatever it takes to sell but his message was that the mechanics say if you put premium in every now and then ...(maybe every fifth fill up) you should be fine.
Only an issue when you start getting over 50K, 60K etc...
Sounds like fiction to me?
#29 of 55 Re: premium fuel [frog22]
Feb 10, 2008 (10:08 am)
The worse that can happen to your engine from the use of regular fuel is a low level of engine knock/ping until the ECU figures out the correct A/F mixture to prevent knock/ping and also adjusts the shift pattern accordingly to prevent knock/ping due to engine lugging.
In the end the A/F mixture will run a bit on the rich side and the transaxle will be a bit quicker to downshift and/or not so quick to upshift into the next higher gear.
The monetary result....???
But you may very well burn enough "extra" regular fuel to make up for the money you "saved".
#30 of 55 Has anyone...
Feb 13, 2008 (9:42 am)
thought about hard-wiring the turbo wastegates into the fully open position??
IMMHO the FE could be improved dramatically if the driver could somehow choose when the turboes are to be used, say not prior to 2/3's throttle or only with RAPID gas pedal depression.....