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Can a 2000 ford 5.4 Liter v8 Triton engine run on E85?

No, a 2000 Ford 5.4L Triton V8 engine was not designed to run on E85 (85% ethanol, 15% gasoline). While some later model vehicles had flex-fuel capabilities, the 2000 model year did not. Attempting to run E85 in a non-flex-fuel vehicle will likely cause damage to fuel system components, including:

* Fuel injectors: Ethanol can corrode and damage rubber and plastic parts within the fuel injectors.

* Fuel pump: Ethanol can damage the seals and components of the fuel pump.

* Fuel lines and hoses: Similar to injectors, ethanol can degrade these parts.

* Engine seals and gaskets: Ethanol can cause swelling or deterioration of rubber seals and gaskets.

In short, using E85 in a 2000 Ford 5.4L Triton will almost certainly lead to costly repairs. Stick to regular gasoline as specified in your owner's manual.