Dec 3 2007, 01:57 PM
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#1
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Group: Admin Posts: 6,906 Joined: 22-February 06 From: Austin Member No.: 9 |
Ok, so I'm a little leary about fuel additives. As in, do they do any good or are they just a scam, sucking money from gullible folks wanting to eke another 1 mpg out of their engine?
HEBs around Austin (and elsewhere, I presume) have started tacking on "Additech" machines alongside the pumps, where you can choose to pay some extra moolah and get an additive pumped in along with your gasoline. I do know that their little spiel is bloody obnoxious. What I don't know is if they do any good and whether I should bother trying an additive out one of these days. -------------------- |
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Dec 3 2007, 05:41 PM
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#2
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Group: Admin Posts: 6,906 Joined: 22-February 06 From: Austin Member No.: 9 |
The knocking is caused by the fuel igniting during the compression stroke of the engine, before the spark plug fires. High performance engines run at higher pressure, so fuel is more prone to ignite early. The octane rating is basically a measure of how resistant the fuel is to that. Higher octane can be run properly at higher pressures.
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Spectatrix Fuel additives Dec 3 2007, 01:57 PM
impala454 Nah its just a money grab. Gasoline already has s... Dec 3 2007, 02:03 PM
Jim QUOTE (impala454 @ Dec 3 2007, 02:03 PM) ... Dec 3 2007, 02:10 PM
impala454 QUOTE (Jim @ Dec 3 2007, 02:10 PM) Wrong
... Dec 3 2007, 03:08 PM
Jim QUOTE (impala454 @ Dec 3 2007, 03:08 PM) ... Dec 3 2007, 03:17 PM
Spectatrix QUOTE (Jim @ Dec 3 2007, 03:17 PM) Oh, so... Dec 3 2007, 03:48 PM
Rastaman I think the fuel additives work if you have certai... Dec 3 2007, 03:19 PM
Jessica I'm no physics or mechanical engineering major... Dec 3 2007, 03:54 PM
Rastaman QUOTE (Jessica @ Dec 3 2007, 03:54 PM) I... Dec 3 2007, 04:14 PM
impala454 It's pretty funny when two girls (no offense) ... Dec 3 2007, 04:09 PM
Jessica RE: Fuel additives Dec 3 2007, 04:10 PM
Rastaman That stuff seemed to work for me. About 3 more mpg... Dec 3 2007, 04:12 PM
Jessica over time it does cause build-up from everything I... Dec 3 2007, 04:16 PM
Rastaman QUOTE (Jessica @ Dec 3 2007, 04:16 PM) ov... Dec 3 2007, 04:18 PM
Jessica Should I really trust someone who comes on HERE to... Dec 3 2007, 04:21 PM
Rastaman QUOTE (Jessica @ Dec 3 2007, 04:21 PM) Sh... Dec 3 2007, 05:04 PM
Oasis They aren't worth it for the increase in fuel ... Dec 3 2007, 04:25 PM
Spectatrix The octane level has very little to do with carbon... Dec 3 2007, 04:39 PM
Jessica QUOTE (Spectatrix @ Dec 3 2007, 04:39 PM)... Dec 3 2007, 05:13 PM
chook QUOTE (Spectatrix @ Dec 3 2007, 04:39 PM)... Dec 3 2007, 10:38 PM
Spectatrix I think your understanding of it is a bit skewed..... Dec 3 2007, 05:27 PM
Jessica but what causes the knocking? not buildup? Dec 3 2007, 05:30 PM
Jessica oooo
you get 5 nerd points Dec 3 2007, 06:13 PM
Spectatrix QUOTE (Jessica @ Dec 3 2007, 06:13 PM) oo... Dec 4 2007, 03:44 PM
Jessica QUOTE (Spectatrix @ Dec 4 2007, 03:44 PM)... Dec 4 2007, 03:45 PM
Psykopath QUOTE (Jessica @ Dec 4 2007, 03:45 PM) I ... Dec 4 2007, 03:48 PM
Jessica QUOTE (Psykopath @ Dec 4 2007, 03:48 PM) ... Dec 4 2007, 03:49 PM
Psykopath QUOTE (Jessica @ Dec 4 2007, 03:49 PM) wo... Dec 4 2007, 03:50 PM

Jessica QUOTE (Psykopath @ Dec 4 2007, 03:50 PM) ... Dec 4 2007, 03:52 PM
Dogmeat QUOTE (Jessica @ Dec 4 2007, 04:49 PM) wo... Dec 4 2007, 03:51 PM
Jessica QUOTE (Dogmeat @ Dec 4 2007, 03:51 PM) Th... Dec 4 2007, 03:53 PM
Dogmeat QUOTE (Jessica @ Dec 4 2007, 04:53 PM) BE... Dec 4 2007, 03:54 PM
Jessica QUOTE (Dogmeat @ Dec 4 2007, 03:54 PM) I... Dec 4 2007, 03:55 PM
zetec I've always liked RXP -- I usually add one tee... Dec 3 2007, 06:35 PM
Jessica do you still work for them? can you get me a disco... Dec 3 2007, 10:39 PM
Fedor I got hookups with the CEO of Valero. Holla Dec 3 2007, 10:40 PM
Jessica HOOK A SISTAH UP Dec 3 2007, 10:42 PM
Dogmeat QUOTE (Spectatrix @ Dec 3 2007, 02:57 PM)... Dec 4 2007, 03:31 PM
Spectatrix You people have dirty minds.
Why did my fuel addi... Dec 4 2007, 03:57 PM
Psykopath QUOTE (Spectatrix @ Dec 4 2007, 03:57 PM)... Dec 4 2007, 03:58 PM
Dogmeat HAW HAW I DIDNT EVEN START IT THIS TIME!!... Dec 4 2007, 04:09 PM
Spectatrix Zach is a naughty man. Dec 4 2007, 04:41 PM
Psykopath QUOTE (Spectatrix @ Dec 4 2007, 04:41 PM)... Dec 4 2007, 06:07 PM
Divergent Reality dirty girl. Dec 4 2007, 05:09 PM
Spectatrix Me or her? Dec 4 2007, 05:10 PM
Divergent Reality yes Dec 4 2007, 05:11 PM
woody when my car makes a knocking sound, i just turn up... Dec 4 2007, 09:41 PM
Jessica QUOTE (woody @ Dec 4 2007, 09:41 PM) when... Dec 4 2007, 09:47 PM
Hartmann I'll give a quick word of warning (don't f... Dec 5 2007, 03:45 PM![]() ![]() |
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