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Author: Subject: Regular/Premium Gas
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mrbenl
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[*] posted on 4-5-2011 at 01:07 PM Reply With Quote
Regular/Premium Gas



What happens if you put regular gas in a car that is recommended to use premium?

Why do some cars require premium anyways?

I'm just wondering cus I have a '10 Acura TSX which is recommended premium but realized that my engine is essentially a tuned Honda engine (which requires regular fuel).
And also cus gas prices are getting quite high again :( lol..

Thanks for any insights.
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Helscreamer
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[*] posted on 4-5-2011 at 01:49 PM Reply With Quote


High compression ratio engines need premium gas. If you don't use premium gas, you'll get knock back, which is essentially premature ignition of the air/gas mixture when the piston is compressing it. High compression ratio engines produce enough heat when compressing the air/gas mixture to ignite it prematurely.

So don't use regular or you'll fuck up your engine.
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[*] posted on 4-5-2011 at 02:20 PM Reply With Quote


well i have heard that if you use regular in sport cars you'll lose a bit of hp. Also, i have heard that by using regular gas, you'd hear a lot noises like "ping ping". i wouldn't risk it. Regardless, gas is already expensive, premium is only a bit more.



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ellick_k
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[*] posted on 4-5-2011 at 04:31 PM Reply With Quote


Quote:
Originally posted by Helscreamer
High compression ratio engines need premium gas. If you don't use premium gas, you'll get knock back, which is essentially premature ignition of the air/gas mixture when the piston is compressing it. High compression ratio engines produce enough heat when compressing the air/gas mixture to ignite it prematurely.

So don't use regular or you'll fuck up your engine.


^^couldnt of done it better myself^^

octane i believe is the ability to resist combustion so if your engine is a higher compression it will require a higher octane...

lets just say for the 10bucks you save per fill up is not worth a $5000 engine replacement a few years later
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theone111
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[*] posted on 4-5-2011 at 04:40 PM Reply With Quote


yeah +1 to everything said. use premium if it says to use premium. some of my friends use premium when they require regular so they maintain their beloved car...rich bastards lol
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Helscreamer
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[*] posted on 4-5-2011 at 06:46 PM Reply With Quote


Quote:
Originally posted by ellick_k
^^couldnt of done it better myself^^

octane i believe is the ability to resist combustion so if your engine is a higher compression it will require a higher octane...

lets just say for the 10bucks you save per fill up is not worth a $5000 engine replacement a few years later


You're right, a higher octane means the gasoline carbon chains are longer, requiring just a little bit more energy in order to achieve ignition. What that means is higher octane can take the higher compression/heat generated in higher compression ratio engines.
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[*] posted on 4-5-2011 at 07:58 PM Reply With Quote


Yeah, never put regular gas into a premium car, otherwise the engine will ping from premature detonation, which is very bad for the piston.
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[*] posted on 4-5-2011 at 08:59 PM Reply With Quote


yeah, stay with premium, if u cant afford premium gas in the first place, why did you even get a tsx?

i got an 04 tsx, it used premium all its life and running as it was the first day

go in acurazine.com, its filled with info, dedicated to acura cars
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mrbenl
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[*] posted on 4-6-2011 at 04:18 AM Reply With Quote


Cool, thanks a lot for all of your input :D
Def sticking to premium then lol.
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[*] posted on 10-17-2012 at 06:47 AM Reply With Quote


Stick to premium even if your engine doesn't require it. If you love your car (and I'm guessing you do or you would've bought a sh!tbox daily driver) then use only the best fuels and lubricants - your car will repay you with reliability and endless hours of enjoyment.
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ken5788
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[*] posted on 10-17-2012 at 09:44 PM Reply With Quote


Actually to convince you even more. on top of what other people said...
using regular will make you end up paying more than if you went with premium to begin with.
I read online and saw people test it and they concluded that you use more gas on regular (due to some gas wastage because you engine has to slow down the ignition or something like that...)

So I tried it on my Civic Si 2012 (same engine as the TSX 2012). I use like almost 2L/100km less on average. On highway at about 100km/h with regular gas I use up about 7-8L/100km, but with premium gas in, I'm at 5-6L/100km.

Obviously the average is higher since I just don't do highway drive, but let's say i drove 100km for sake of argument...
Today my gas was at 1.384$/L for regular and 1.469$/L for premium
So on 100km drive if I used up 8L/100km, that costs me 1.384 * 8 = 11.072$ if I use regular,
but for premium: 6L/100km that costs me 1.469 * 6 = 8.814$...

Anyways that's just to give you a general idea...
So premium all the way haha

Edit: just want to mention the gas mileage changes if your car is required to have premium and you put regular, but not the other way around. So if you're car just requires regular and you put premium, it will not change the gas mileage
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