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Sal asked:


How many air filters does a 2000 Nissan Altima SE have? And does replacing them all make big difference in gas saving?

It’s automatic 2.4 engine and I get 22-25 on the highway at an average speed of 80. Is this normal? How can I get better gas mileage for this car? Other than driving at low speed because it doesn’t work for me to drive 100 miles each way and work 12 hours. Thanks!

Heat Pump Ratings