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dman98765

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  • Lexus Model
    RX 350

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  1. Wow, have had my car for 3 years, and owned a house for the past year with a garage door opener, and never could get them linked. Bought the car new, and tried doing it according to the owners manual with no luck. Tried this and, VOILA!! It's working! Excellent info, thanks!
  2. Your Lexus dealer is wrong about mpg. Octane rating is simply a quantative figure to indicate the ingnition temperature of the fuel. Higher octane fuels are used for higher compression engines since the ignition temperature for gasoline decreases as the cylinder compression increases. Highere octane fuels prevent pre-ignition. Pre-ignition (the pinging and knocking noise) is one of the worst things that can happen to your engine. It occurs when the fuel in the cylinder ignites while the piston is still traveling upward toward the cylinder head rather than igniting at the top of the piston travel to force the piston downward (the power stroke). To find out if your vehicle will work with lower octane fuels: Run your vehicle down to 1/8 th of a tank. Fill up with 5 gallons of mid-grade (89 octane in my area). Drive normally. If you feel any knocking or pinging, IMMEDIATELY top the rest of the tank with premium (91 octane in my area). If no knocking or pinging occurs, your good to drive on that octane level. Remember that different states have different fuel formula requirements. I had a vehicle that would knock in California on 87 oct. but ran fine in Florida on 87 oct.
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