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Old 02-08-2012, 05:48 AM
 
Location: WI
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in a similar line, we had an FJ when they first came out, had to run premium. And it had what i thought to be the exact same motor (with slightly different tune) as in the 4-runner and that ran regular.
But yes i'd say if the engine has a turbo and the factory lists premium, then run premium. It just comes with the territory on some rides
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Old 02-08-2012, 08:41 AM
 
3,129 posts, read 5,295,702 times
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Quote:
Originally Posted by X-Greensboro Resident View Post
The new ILX is pretty much a luxary Civic, I'm surprised that it will also require premium gas given the engine lineup.
I cannot believe how terrible it is. MPG is terrible for an econo-car...worse than the Accord, let alone an Elantra, Focus, etc

Moderator cut: Off Topic/Unnecessary, you've already presented this argument

Last edited by TheViking85; 02-08-2012 at 12:46 PM..
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Old 02-08-2012, 08:59 AM
 
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The reason the Acura's all require premium is that they run higher compression ratios then their Honda counterparts. The Japanese premium brands have tended to do this for a while. Take the same engine, increase compression and/or timing and get a horsepower bump and change over to premium fuel. Lexus was the first to buck this trend when they switched the ES350 back to regular gas, with a corresponding slight power drop.

As others have said, the ever increasing use of direct injection is reversing this trend, where cars can run high compression ratios and more aggressive timing, while still using regular gas. Engines like the SkyActiv introduced by Mazda are DI and use regular despite very high compression ratios. Hyundai took the same direction with the Sonata turbo, designing it to run on regular do to the advantages of DI.

Honda, of course, is the only mainstream manufacturer that has flat out stated that they won't be adopting DI technology anytime soon, so don't expect Acura's running around on regular anytime soon.
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Old 02-08-2012, 10:33 AM
 
Location: Central Texas
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Originally Posted by NJGOAT View Post
Honda, of course, is the only mainstream manufacturer that has flat out stated that they won't be adopting DI technology anytime soon, so don't expect Acura's running around on regular anytime soon.
Not true. Honda has announced DI and it is expected to appear in the next year or two.

Car and Driver Blog Honda Finally Adds Direct Injection to Its V6 and Four-Cylinder Engines
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Old 02-08-2012, 10:41 AM
 
Location: Indianapolis
3,675 posts, read 7,822,058 times
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Originally Posted by hoffdano View Post
Not true. Honda has announced DI and it is expected to appear in the next year or two.

Car and Driver Blog Honda Finally Adds Direct Injection to Its V6 and Four-Cylinder Engines
Wow... that would be cool, no?
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Old 02-08-2012, 12:31 PM
 
Location: Central Texas
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Not sure why you are SOOOO negative on Honda. BMW has had DI for just five years in the US, and they have had many problems with the high pressure fuel pump. Infiniti's first DI engine was introduced in 2010. So yes Honda is a bit late to market with DI. But they were first in the US with variable valve timing, one of the very first with PGM-FI (from F1), and the first to use titanium in the engine.
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Old 02-08-2012, 02:37 PM
 
Location: Dallas, TX
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Quote:
Originally Posted by Spanky25 View Post
Do all Acuras take premium gas? I'd figure since it was made by Honda, it would have better gas/octane levels like my Accord.
As will the next RDX, which will be using a 3.5/V6, likely shared with Odyssey. However, the Acura will ask for premium while the Honda will be rated with regular. Acura version usually gets rated on premium along with better power and torque curves.
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Old 02-08-2012, 03:29 PM
 
Location: Central Texas
13,720 posts, read 25,460,557 times
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Quote:
Originally Posted by EinsteinsGhost View Post
As will the next RDX, which will be using a 3.5/V6, likely shared with Odyssey. However, the Acura will ask for premium while the Honda will be rated with regular. Acura version usually gets rated on premium along with better power and torque curves.
Honda, like Nissan, uses the same basic engine in various flavors.

The 3.5L in the Odyssey has 248 HP, is SOHC iVTEC, and has a 10.5:1 compression ratio. It also has VCM (turns off cylinders at times).

The 3.5L in the RDX is supposed to be the same as the V6 in the TSX. It has 280 HP, SOHC VTEC, and has a 11.2:1 compression ratio.
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Old 02-09-2012, 12:36 PM
 
14,780 posts, read 35,873,121 times
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Quote:
Originally Posted by hoffdano View Post
Not true. Honda has announced DI and it is expected to appear in the next year or two.

Car and Driver Blog Honda Finally Adds Direct Injection to Its V6 and Four-Cylinder Engines
I missed that one, thanks for the link and info. So, it looks like we might see some DI Honda engines in the next couple years. FWIW, while it sounded like I might have been kind of knocking on them for not using it, I don't blame them one bit for waiting and trying to get it "right".
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Old 02-09-2012, 08:17 PM
 
Location: Chandler, AZ
5,802 posts, read 5,445,530 times
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That makes plenty of sense; Honda has always had a reputation of being a leader and/or very agressive in technology-related matters, and jumping into the DI arena makes plenty of sense, even if some of their competitors have already beaten them to it.

It's not very easy to admit a mistake or stick with an underwhelming product such as the new Civic, and I'm also glad that a new one could be out next year.
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