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We had a 95 SL2 that would easily get 40mpg.
The wheel covers helped.
Slowing down to 55-60 made a large difference.
Bore out the throttle body and have a larger (matching) throttle plate installed.
Put in an adjustable fuel pressure regulator and increase it a few pounds.
The spray pattern will improve.
At that mileage you will be nearing a ring job due to sticking piston rings. How's your oil consumption?
It's an easy in car rebuild.
While the heads is off, do the valves and clean the ports a bit.
Get rid of the cast 4-1 header. Find one from a 96 (93? Been too long) that is a welded 4-2-1 factory header.
It willl flow better and still retain the factory O2 sensor.
I miss that car, some lady t-boned my wife. The car sacrificed itself, all she got was a head gash and minor whiplash.
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