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4

There has been a lot of good information shared here, especially by Lawrence Wade (from my perspective). But we're slightly left hanging about the two closely-related fundamental questions from the OP: Will higher octane fuel, increase power while towing? and Will higher octane fuel impact the available power in common v-6 regular gas burning ...


3

A lot of people get confused with octane ratings. The octane rating is the fuels resistance to detonation, ie, the fuel / air mix igniting just due to pressure. When this happens the resulting burn is very violent and can easily cause major engine damage. When the fuel / air mix burns normally it pushes down progressively on the piston; when detonation ...


5

... As the air gets thinner at higher altitudes, your air/fuel ratio is going try to stay the same (emissions, performance, fuel efficency) if you're under the control of the ECU in closed loop mode. Consider the Mass Airflow Sensor, which detects the total mass (not volume!) of air entering the engine by a hot wire resistance sensor. Note that I have no ...


6

Two great comments already; couple of things to add. The reason why we have Octane types is because the lower-octane fuels tend to ignite at lower temperatures (ie. hot metal parts inside the combustion chamber, rather than the spark plug firing) or lower compression pressures (ie. the compression fires the engine like a diesel engine works). The octane ...


6

Engine control systems in typical cars do not generally change the spark advance to add more than expected, the engine is designed to run at a particular efficiency for a given octane, so changing it from whats specified by the manufacturer isn't a good idea. If there is sub optimal conditions and the engine management detects a problem, fuel mix or knock ...


4

My brother said that it ended up being the timing belt; he assumes it was broken teeth. He didn't really care why because he only needed it fixed enough to pass a "cash for clunkers" program.


16

That is a great question. I believe the true answer here is "it depends". Like so many other things you can do with your vehicle, if your vehicle cannot use the higher octane fuel, it won't benefit from it. Something to remember about octane ratings is, the higher number does not mean it is more energy dense. The higher number indicates the fuel is actually ...


2

From Ben's comment, It's probably just a coincidence that the pump shaft seal started leaking. Universal fluids are used all the time and the Toyota power steering pump isn't anything special. Either way the pump has to be replaced/rebuilt You either need to replace the pump or rebuild it. Also, if you flush the system, or have done prior to the leak ...



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