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Really no fix for low compression. I don't think you can even say bandaid, more like a spray of bactine maybe.
Cleaning injectors, fuel cut might buy you a few months. At least it might be easier to start for awhile. You know it is short term and you have the other motor. Drive it till it drops. You are over Mazda's projections.
Redline fuel injection cleaner. As will the cut switch. Half bottle per tank, two tanks, once a year and you should never have any injector issues. Works on all models. Also Redline formula is the only aftermarket that I know of that is approved by Mazda. Heavier oil not necessarily going to help with compression. Lighter might because you would blow by more, so more would get to the combustion chamber. Neighbors probably wouldn't like you, unless you have a mosquito problem.
Usual life expectancy in Tucson is 180K for the 2nds. Most are at replacement criteria specs at 140. Dry heat isn't kind to the round motor.
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