- #324 of 333
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2008 Base TL Premium Gas Issue
by smarty666
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Aug 03, 2009 (5:47 pm)
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I drive a 2008 Base TL and have been using Hess 93 Octane gas for the last year; I've been getting a respectable 24 MPG with mostly rural town/city driving and about 28-29 MPG with highway/interstate travel; over the last two months I switched to Shell V-power after reading several articles on Edmunds, etc how Shell is a top tier fuel and they most people get their best gas mileage with them but I don't see that happening with me; I've had 6 fill ups with Shell V-power and have lost 2 MPG in all driving; I now get 22 MPG with mostly rural town/city driving and about 25-26 MPG with highway/interstate travel; has anyone else had this happen to them? I was going to give it another two fillups with Shell V-Power to see if the MPG improves but if it doesn't I'm going to switch back to Hess/Exxon/BP 93 Octane
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- #325 of 333
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Re: 2008 Base TL Premium Gas Issue [smarty666]
by rickpoole
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Aug 03, 2009 (7:32 pm)
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Replying to: smarty666 (Aug 03, 2009 5:47 pm)
Not with Hess/Shell but with Racetrack/Chevron. I had been getting about 21 mpg mostly city driving (85% city, very conservatively driven) using Racetrack 93. But the last two fillups were at the same Chevron with 93 and mileage was down immediately - still 21 mpg but with 50% city (should have been around 24). Went back to Racetrack and after 1/2 a tank of 85% city it is currently at 22 (reading 24 but is always 8-10% high). While running the Chevron 93 it didn't seem to have as much power so it makes me wonder if their 93 tanks got filled with 87. According to local Acura dealership there is no way to determine this from the diagnostic equipment and a local lab says it would cost about $100 to run a test to determine the octane rating of a sample of gas.
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- #326 of 333
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Re: 2008 Base TL Premium Gas Issue [rickpoole]
by smarty666
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Aug 04, 2009 (6:48 am)
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Replying to: rickpoole (Aug 03, 2009 7:32 pm)
The only thing I can think of is that both Exxon and Hess have stickers on their pumps that say 10% ethanol while the Shell stations do not; so Shell either has no ethanol in their gas or less than 10%; I've read that ethanol is suppose to help thin out the gas and make it burn less emissions; its possible that the car is able to get better fuel economy gasoline with 10% ethanol cause its thinned out and its not used to pure gasoline so the car uses the ethanol to burn the gas more efficiently and thus better fuel economy; this is only a assumption but it is the only thing I can think of off the top of my head that could explain why I've been getting worse gas mileage with Shell
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- #327 of 333
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Re: 2008 Base TL Premium Gas Issue [smarty666]
by m6user
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Aug 25, 2009 (8:36 pm)
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Replying to: smarty666 (Aug 04, 2009 6:48 am)
Ethanol blends actually reduce your mpg not enhance it. Don't know why you're getting less mpg at Shell but ethanol is not the answer. Straight ethanol, while being cheaper to buy, delivers only about 70% mpg compared to straight gasoline so a 10% blend probably reduces mpg about 1-2 mpg.
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- #328 of 333
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Re: 2008 Base TL Premium Gas Issue [m6user]
by smarty666
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Aug 26, 2009 (4:07 pm)
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Replying to: m6user (Aug 25, 2009 8:36 pm)
well if it is not the ethanol I don't know what it is but since switching back to 93 octane Hess and Exxon gas I'm getting 2-3 mpg better than when I was using the Shell and back to what I was getting before; can't figure out why because it seems opposite from what it should be but I have to go where ever I'm getting the better mpg at - oh well
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- #330 of 333
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Base TL Fuel Econ from 04-06 and 07-08
by smarty666
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Sep 24, 2009 (6:23 am)
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I previously leased a 06 Base TL and now am leasing a 08 Base TL; I was looking at the original window stickers and the EPA on my 06 was 20mpg city - 29mpg highway and my 08 is 18mpg city - 26mpg highway; I also looked up in my gas records and saw that on avg I was getting 24-25 mpg with 80% rural and 20% highway driving on my 06 Base TL and now with my 08 Base TL on avg I'm getting 21-22mpg with 80% rural and 20% highway driving; both cars are filled with the same 93 octane gas and driven relatively identical but the drop in mpg from 06 to 08 is consistent with the EPA drop on the window stickers; what I don't understand is what changed between the 04-06 models and the 07-08 models to warrant the drop in fuel econ? the base engines were the exact same and the gas tank is the same size so I am at a lost as to what changed between 2006 and 2007 that affected the fuel economy? any suggestions or ideas would be appreciated!!
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- #331 of 333
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07 highway MPG
by mf15
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Sep 26, 2009 (6:29 am)
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07 base TL about 17000 miles, get 30-31 MPG on highway at 74+ per OBC.
Got to love the car,will cry when lease is up next year.
Old Mike
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- #332 of 333
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Re: 2009 MPG? [neiman]
by mkacura
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Sep 28, 2009 (7:41 pm)
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Replying to: neiman (Jul 28, 2009 1:31 pm)
New car at 410 miles so not even broken in. 09 TL AWD non Tech. Northern NJ to Boston, straight shot with one bio break. No traffice jams, no A/C, no cruise, 65-70 MPH with burst of 75+ for passing. About 200 mile trip. Got highest 28.7 but I would say floating aroung 28.3.
Delighted! Can't imagine what the number will be when the engine is broken in. Gas used was 1/2 tank left over from the dealer and the rest Sunoco Premium (91). Yeah I know, while pumping I realized they had Ultra (93).
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- #333 of 333
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Re: Base TL Fuel Econ from 04-06 and 07-08 [smarty666]
by smarty666
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Nov 07, 2009 (8:03 am)
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Replying to: smarty666 (Sep 24, 2009 6:23 am)
I just couldn't believe based on other peoples reports that Shell gas would give me worse gas mileage then Hess/Exxon but suffice it to say I went back and tried the Shell Premium again and it must of been that it just took awhile to get rid of the other crap gas and gunk in the engine but I'm finally getting much better fuel economy on my 08 TL: now, with Shell V-Power, I'm getting 24-25mpg avg compared to 21-22mpg avg before with Hess/Exxon: same driving dynamics with about 80% rural city driving and 20% highway/interstate driving: very happy with this gas mileage than what I was getting before: I've been able to get about a 28-29mpg reading on the open highway/interstate: All I have to say is what Mr. Burns would, EXCELLENT!!!!!!!!!!!!!!!!
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