What happens over time when you put lower grade gas in a car that asks for high grade gas? Example- my car asks for 91 and I use 87 all of the time.
2007-03-01 21:57:19 · 8 answers · asked by Wisdom??? 5 in Cars & Transportation ➔ Maintenance & Repairs
I need real answers, not insulting ones like those left by a couple of folks.
2007-03-01 22:10:35 · update #1
The reason that they are suggesting 91 octain gasoline is because of the engines compression ratio. When ever an engine has a higher compression ratio (9.5 : 1) or greater the need for the higher octain fuel is greater. In a higher compression engine the lower octain fuel can 'detonate' (spark knock) and over timed this can erode the surface of the pistons, eventually to the point of failure. If you are not hearing a lot of spark knock while accelerating, you may get along with the lower octain fuel for quite a while, but with all the electronics on the newer cars now it can be difficult to know whether spark knock is occurring as they have knock sensors which feed back to the computer and it will retard the timing or adjust the mixture slightly to compensate. Another thing to point out is that the catalitic converter will probably not last as long running the lower grade fuel, it will plug up with waste carbon from the lower grade fuel. In short what you save at the pumps you may wind up spending for (and a great deal more) at the repair shop some day on down the way.
2007-03-01 22:34:07 · answer #1 · answered by alk99 7 · 3⤊ 0⤋
The 91 octane is needed because of the engine compression ratio. Using a lower octane will generally cause detonation (pinging) to occur. Some modern engines compensate for this with the on board computer. However this is only for short term. You should start using 91 as soon as you can
2007-03-02 01:36:11 · answer #2 · answered by adjuster5 3 · 1⤊ 0⤋
even as the sunlight is a "ball of gas", it isn't easily "burning". the nice and cozy temperature (and mild) it produces is via a procedure observed as nuclear fusion, in which hydrogen nuclei are "fused" mutually to variety helium. that is a really exergonic reaction, meaning it releases a great number of power. The sunlight will finally run out of hydrogen to fuse, and could commence fusing helium into different aspects. yet do not problem! The sunlight nevertheless is made up of round seventy 4% hydrogen, so it's going to proceed to artwork for a lengthy even as yet!
2016-11-26 23:52:37 · answer #3 · answered by Anonymous · 0⤊ 0⤋
honest nothing, all it telling you you get better miles on the high grade of gas, ,, but honest it just a way to get your monery at the pump,,2th the high grade gas burn more hoter, an cleaner, just get a bottle of gas treament an add to your gas
2007-03-01 23:54:46 · answer #4 · answered by ghostwalker077 6 · 0⤊ 1⤋
Long explanation short - you're gonna get knocking, poor performance and eventually very expensive engine damage.
2007-03-02 04:08:28 · answer #5 · answered by ? 4 · 1⤊ 0⤋
What problems have you been having? You may experience pinging or dieseling. Your problems could range from misfires to not working at all, or no problems what so ever.
2007-03-01 22:05:56 · answer #6 · answered by Anonymous · 2⤊ 0⤋
U gonna stop 4 kilometers/miles depending what u use before the gas station one day and u gonna rue that day...
2007-03-01 22:00:06 · answer #7 · answered by Anonymous · 0⤊ 2⤋
you'll ruin your car, stupid.
If it says high grade, then it needs it, the impurities or whatever will trash your vehicle.
2007-03-01 22:00:16 · answer #8 · answered by kenniemcooper 3 · 0⤊ 2⤋