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Thank you, just replaced rear shocks, one was so dead that when I undid the upper mount it sank under its own weight, top cover that is supposed to slide down had come off and almost all fluid had leaked out...
No wonder ever bump made the whole car vibrate and it would vibrate just below highway speed...
That in and of itself will probably give me a major boost, and since the zetec comes with a basic CAI (sucks air into bottom of box from under hood lip) I took off top of stock air box and added a cone filter to the end leaving it to get some of the warm air (like a warm air intake) and now can start off easier in lower gear without it having so much as a struggle...
Next is to change the oil with a synthetic and transmission fluid to reduce friction within the engine then clean out the engine once more and replace the fuel filter for even better economy...
Oh and that 2mpg equates to an 8.22% increase in economy...
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