Noob need help ! - Toyota Yaris Forums

CarBob08 · 05-10-2010, 08:17 PM

There is another thing to consider... on a full tank of fuel, you will have "colder" fuel and it will take longer for it to warm up through recirculation and heating in the fuel lines above the engine. So, it is possible to have a slight difference, but generally it shouldn't be noticeable.

As for the higher octane, I have done some extensive studies on my car with both 87 and 92 octane. I get more mpg's with 92, average goes up about 1.0 mpg, but with the cost of the fuel being 20 cents higher, doesn't warrant the extra cost. I still run it though, because I notice that my off-idle throttle response is a touch better and it makes it easier to get the clutch out without chatter on the 92 octane. My 2 cents.

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05-10-2010, 08:17 PM	#1
CarBob08 Drives: '08 3-Door Join Date: Apr 2010 Location: Oregon Posts: 35	There is another thing to consider... on a full tank of fuel, you will have "colder" fuel and it will take longer for it to warm up through recirculation and heating in the fuel lines above the engine. So, it is possible to have a slight difference, but generally it shouldn't be noticeable. As for the higher octane, I have done some extensive studies on my car with both 87 and 92 octane. I get more mpg's with 92, average goes up about 1.0 mpg, but with the cost of the fuel being 20 cents higher, doesn't warrant the extra cost. I still run it though, because I notice that my off-idle throttle response is a touch better and it makes it easier to get the clutch out without chatter on the 92 octane. My 2 cents.