Hi, I'm a new member of this site and I think it is very informative in what I'm looking for. I just recieved a 1992 Toyota Camry 4 cylinder Manual car as a gift and I would like to further increase its fuel economy. It is certainly an upgrade in FE from my 8 cylinder 1994 Camaro Z28. My goal is to increase both the mileage and performance of the Camry. I have seen plenty of threads claiming you can't increase both but I don't believe that to be true. A few mods I am planning on doing is adding : undertray to decrease the air resistance from under the car. wheel skirts to decrease air resistance from the wheel wells and sides of the car Interior side view mirrors to reduce air resistance Partial Grille Block reduce air resistance cold air intake to let in more dense air by collecting air from a cooler region. Older cars usually have intakes that are not as strategically placed as newer cars. Anti-roll bar/strut bar to increase handling Remove excess weight such as spare tire/jack Magnaflow performance muffler to slightly decrease backpressure. Improves both performance and FE Aftermarket less restrictive catalytic converter Slightly relieve back pressure to increase FE and performance. Turbocharger Debating whether to add one. Mixed debate on whether it increases or decreases fuel economy. Let me know if there is anything I missed! Or if you guys have any other suggestions. What do you think about my steps for increaseing performance and FE?