so my replacement engine i got from mazda was never at factory spec but now the front rotor is down to 104 104 104 corrected (101 101 101 non corrected) the rear is at ~110 about non correct

is this enough to get a new engine or are they strict on the 98.7, so far also i got 13 mpg on my last tank of gas so something is up also stalled at the stop light once.

but my real question is what am i doing wrong? the engine has 13,000 miles on it, i premixed nearly everytank, i used 10w30, i drove it to redline every now and then but yet it still lost most of its compression


edit: oil changed every 2k miles

the first engine had normal dino oil
the second engine had synthitic oil

the second engine was extremely clean when doing the zoom cleaner, a few little puffs