"71MGBGT Likes Subarus of Unusual Colors" (adamprotter)
04/28/2015 at 02:00 • Filed to: None
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"71MGBGT Likes Subarus of Unusual Colors" (adamprotter)
04/28/2015 at 02:00 • Filed to: None | 0
| 11 |
With premium, will it hurt the engine? Sorry about the stupid question. Pictures of the Honda we all really want for your time
PetarVN, GLI Guy, now with stupid power
> 71MGBGT Likes Subarus of Unusual Colors
04/28/2015 at 02:05 |
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nope. shouldn't do anything. you can always go higher, not lower
the engine will detect a bigger bang due to stronger gas, and set itself to run appropriately
and no, you won't see a performance increase unless you change the software in the ECU so it uses the power of the stronger gas
TheLOUDMUSIC- Put it in H!
> 71MGBGT Likes Subarus of Unusual Colors
04/28/2015 at 02:08 |
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Pretty much what PetarVN said. I’d just go with whatever the manual says. However, I have heard of some engines producing slightly more power with premium when they only require regular, but that’s just hearsay and the gains they bring to light are unnoticeable.
themanwithsauce - has as many vehicles as job titles
> 71MGBGT Likes Subarus of Unusual Colors
04/28/2015 at 02:28 |
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No harm at all. In fact, I recommend a higher octane if you run an AutoX or track day. Reduces any conceivable chance of pinging. I always ran 93 octane in my old 1997 monte carlo when I did autocrosses for this reason. Never once had a problem. I knew a few people who would complain of power loss at the end of a hot day and I couldn’t help but wonder if their ECU was retarding timing to compensate for the earlier detonation or something. 93+ never did me wrong on an 87 octane car when pushed to the limit.
Kevin Barrett
> 71MGBGT Likes Subarus of Unusual Colors
04/28/2015 at 02:40 |
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No, you’ll just waste your money. The octane rating of gasoline is a description of its anti-detonation characteristics. Detonation is an undesired event in a piston engine when gasoline explodes, uncontrolled, due to compression. If an engine uses higher compression ratios, it may need higher octane gasoline in order to resist detonation. If is uses lower compression ratios, it can still use high octane gasoline designed for higher compression engines, but it derives no benefit.
If you just want to fill up with higher octane gasoline because of other additives, or because a fuel station only offers ethanol blends at the lower octanes, and you don’t want hear chirping from the fuel pump in your brand new BRZ quite yet, go right ahead.
lonestranger
> PetarVN, GLI Guy, now with stupid power
04/28/2015 at 02:40 |
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Err, close but not quite. There’s no “stronger gas”, so there’s no “bigger bang”.
Premium gasoline may have some extra additives such as detergents, but the main benefit is that it has a higher octane rating. High octane doesn’t mean high energy, high power, or high strength. It’s just a measure of the fuel’s resistance to preignition (knock). Some engines are more susceptible to knock and will perform their best with higher octane fuel, and will self-adjust to lower octane fuels, with a resulting slight loss in power.
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Kevin Barrett
> PetarVN, GLI Guy, now with stupid power
04/28/2015 at 03:01 |
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“Stronger gas” is bullshit. There is no “bigger bang,” nor any power or efficiency increase due to using a higher octane gasoline than what your car needs. Higher octane gasoline just resists detonation more than lower octane gasoline, and higher compression engines demand higher octane gas because higher compression ratios are more likely to suffer detonation.
What is detonation? It’s just the gasoline exploding uncontrolled before the ignition can start the burn at the correct time. If gasoline is burning early, it does Bad Things to your engine. Even if those bad things don’t all happen, detonation still taxes the efficiency of your engine by trying to make gasoline do its work in the wrong part of the Otto cycle.
But the good news is that if your car only needs 85 or 87 octane, there’s almost no fuel you can buy that would cause detonation.
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Kevin Barrett
> themanwithsauce - has as many vehicles as job titles
04/28/2015 at 03:12 |
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More superstition. Retarding timing (causing it to come
later
in the Otto cycle) can do nothing to prevent a fuel air charge from detonating
before
the normal timing could have ignited it. If anything, it would only make the problem worse. If a car was suffering power loss at the end of a hot day, it’s more likely that an ECU was running a too rich mixture in order to trade power for cooling.
Squid
> 71MGBGT Likes Subarus of Unusual Colors
04/28/2015 at 03:49 |
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Just stick with a quality top tier fuel and you will be fine. Avoid the cheap bargain stations that don’t run additives and there will never be a need for worry. You get no extra power, just resistance from knock and detonation. The only reason I’d ever put 91 in a car that reqs. 87 is if I’m going to wring its neck on a really hot day just for the added benefit of knock resistance. You will see no benefit to running the higher octane unless the car calls for it and you have been thinking that you are saving yourself some money by getting 87.
samssun
> PetarVN, GLI Guy, now with stupid power
04/28/2015 at 05:07 |
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There’ll be no bigger bang in a NA, fixed compression engine. Premium has no more energy, and often less, you just make up for it if your engine is able to run higher compression or boost.
McMike
> PetarVN, GLI Guy, now with stupid power
04/28/2015 at 08:16 |
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You can also go lower with anything made within the last 5-10 years. Knock sensors will detect the lower octane, and the engine’s timing will retard appropriately.
Power will be down, and fuel mileage will take a hit,* but it’s possible to run lower octane.
*In some cases, any money saved by using 87 is lost when your mileage goes down. YMMV
djmanila
> 71MGBGT Likes Subarus of Unusual Colors
04/28/2015 at 09:34 |
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the HSV should have been what the NSX is now...end rant