This is a newly swap. I had the fuel filter, spark plugs, water pump, oil pump, timing belt replaced. I don't know about rotor and cap...does that matter with a 40k mile car? Should I do another oil change at 500 miles on the new engine? The only part of the exhaust system that I haven't replaced is the header. Is the OEM header really constrictive? BTW, I filled up my gas yesterday and noticed I've got 24 mpg. I want to get near 30 if possible.