Regular 87 octane vs premium 91-93 octane fuel
#1
Regular 87 octane vs premium 91-93 octane fuel
Why does the manufacturer recommend 87 octane gasoline when the engine runs like crap with it. When put regular gas, the engine makes rattling noise and pinging noises and acceleration is horrible. Gas mileage also suffers. The same thing happens in my wife's Rav4 which has the same 2.4 engine. When I put premium fuel the engine runs smooth, gas mileage is better as well as power and acceleration. I called Scion and Toyota and the couldn't give me a direct answer. Any feedback would be helpful.
#3
Then why does Toyota/ Scion recommend 87 octane when it runs like crap. They should recommend 91 for better efficiency. I had a Matrix Xrs and the recommended fuel was 91. The gas attendant once filled it with 87 by accident and the car ran horrible. Needless to say I didn't pay for that tank of fuel. LoL
#6
I have used Seafoam on a number of my vehicles. I cannot prove if it actually works or not, but seems to help clean the engine. Lots of folk swear by it.
I use 87 octane regularly in both my 2011 xD & 2013 xB without any ill effects, so I don't pay extra for 91 octane.
I use 87 octane regularly in both my 2011 xD & 2013 xB without any ill effects, so I don't pay extra for 91 octane.
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