Fuel Consumption Report: 3.0 M50/318is
I decided to keep track of fuel consumption for a typical week of driving for my E30 to see how economical it was during a work-week commute. I kept the rules pretty simple: 5-days of commuting to work and occasionally small errands after work. I started Monday morning before work with a full tank, and filled the tank Friday night at about 8pm, after running an errand. This wasn't an attempt to hypermile and get maximum MPG out of the car; just get results from a typical week of driving. 2 of the 5 workdays I redlined 2nd/3rd gear on an on-ramp coming home from work.
The car is a '91 318is, weighs 2620# (w/o driver), and has a 3.0L stroked M50 with no catalytic converter, euro MAF, raised compression, and an adjustable fuel pressure regulator that was set to run at 48psi (58psi at WOT). Getrag 260/3.73/slightly taller than stock tire size.
My commute to work is 24 miles highway (70-73mph) and 3 miles of stoplight-to-stoplight traffic.
I went out to lunch 3 of the 5 days to a deli, total of 6 miles.
I ran errands totalling 17 miles during the week.
In total, I drove 293 miles: Friday night I filled the tank and put in 10.3 gallons. Over 293 miles of driving, that's 28.44 MPG
Better than expected :) Thanks to the adjustable FPR, a light car, good gearing, and an efficient engine, it gets almost the mileage it got with the M42. As a bonus, it will shake off the 996 in the next lane at the drop of a hat. :)
The car is a '91 318is, weighs 2620# (w/o driver), and has a 3.0L stroked M50 with no catalytic converter, euro MAF, raised compression, and an adjustable fuel pressure regulator that was set to run at 48psi (58psi at WOT). Getrag 260/3.73/slightly taller than stock tire size.
My commute to work is 24 miles highway (70-73mph) and 3 miles of stoplight-to-stoplight traffic.
I went out to lunch 3 of the 5 days to a deli, total of 6 miles.
I ran errands totalling 17 miles during the week.
In total, I drove 293 miles: Friday night I filled the tank and put in 10.3 gallons. Over 293 miles of driving, that's 28.44 MPG
Better than expected :) Thanks to the adjustable FPR, a light car, good gearing, and an efficient engine, it gets almost the mileage it got with the M42. As a bonus, it will shake off the 996 in the next lane at the drop of a hat. :)
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