Ford messed up the gapping on the OEM plugs and this is part of the problem with the Ecoboost shudder at 55-60mph. The spark plug gaps are all over the place from. 035 to. 046 on just one members engine.
At the time of publication, the average cost of concrete for a 400-square foot slab, the typical size for a two-car garage, ranges between $583 and $637 or between $1.46 and $1.59 per square foot. On average, contractors will put in about 13 hours of labor to finish a two-car concrete garage slab.
Economical. The cost of concrete floors is very low, about $2 to $6 per square foot to polish a plain gray slab, giving it a lustrous sheen. The concrete's tonal differences, subtle cracks and aggregates take on a stonelike, natural feel.. my home near Philadelphia has a concrete slab floor for the entire first floor which makes the entire area very cold from the Fall through to late spring (despite carpeting installed wherever feasible) and has a definite impact on the size of my heating bills.