I remember the old domestic 4cyl cars couldn't even make it up a hill with the AC on. The Japanese always had the knack for making the best 4cyl cars. Domestics always shined when it came to powerful V8s.That's right. No A/C during summer it adds more load to engine. Roll down the windows and turn the heater on
there used to be signs on some freeways (going uphill) to turn the AC off. Not sure if we still have them or not. also in old days small 4-cyl cars didn't come with "factory air".