Other than AC Delco... cause I don't wanna drop that much $ on it. The car is currently averaging slightly over 26mpg with about 80% highway miles. Lean cruise IS enabled and car is running on 87 octane. The o2 sensor has 100k miles on it so its due, I'm mainly looking to get better mileage out of this thing. I figure with mostly highway miles it should be upwards of 30mpg. So... what o2 sensor is good but lets say for ~$20 US. Or are they all the same? Any other mileage tips? Has new plugs, wires, fuel & air filters, just ran a can of top end cleaner through the intake and will eventually dump one in the tank. I dont have a heavy foot in this car so no need to mention that
==> all in regards to: 1990 Beretta, 3.1 5sp
==> all in regards to: 1990 Beretta, 3.1 5sp
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