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Old 10-05-2021, 10:07 PM   #195 (permalink)
cRiPpLe_rOoStEr
It's all about Diesel
 
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When the engine has indirect injection, the usage of vegetable oils actually improves the fuel-efficiency. Probably those minibuses to which a mileage improvement was reported are Toyota Coasters with the 1HZ engine.
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