thanks everyone for the replies. I have found my problem.
The civic is totally stock including stock sized exhaust, no mud flaps. I do use 5w 30 oil however.
I did pull out my timing light before heading to work this morning and found my timing was way retarded, literally and figuratively. I can tell a huge difference. Before I was having trouble keeping the car in lean burn when climbing very slight up hill grades. Now i have no issues and the car seems to transition into lean much smoother. I just filled up the tank yesterday so it will be two days before I have real numbers to compare but I can definitely feel a difference and i believe my problems and quest to 50 MPG have been solved
Thanks guys
Last edited by jlk16188; 04-30-2013 at 09:31 AM..
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