I have fuel saving device that really works: savings on gas/diesel is significant (about 10%), and improved acceleration and power. Costs approximately 8k with installation. Could be more or less, depending on configuration.
Hey, the air-bleed type "fuel-saving" devices which probably don't work, or have DETRIMENTAL effects on engine and/or environment cost about P6,500 - P10,000 depending on model, and the thingy you put at the "ass end" of your pipe (I love that description, ghosthunter!) and with only one friggin' jeepney as a test vehicle (and tested only once, I think, instead of multiple test-runs) are DUBIOUS.
My "fuel-saving" device has many studies to show it works!
OPEN TYPE K&N FILTER.
(I would like to suggest the drop-in, replacement-type K&N, but really, the improvements are insignificant. The open-type, on the other hand really has noticeable improvements in fuel consumption and horsepower/torque).
CONS: Makes noisy sucking sound, and my engine was a tad noisier.
--Alf


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