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Switching to Perelli P7s cost me about 2 MPG.
I think the OEM Goodyears have a tendency to dry rot. Other LRR tires don't do this. I suspect the issue is the thinner sidewalls.Just out of curiosity do the LRR tires compounds break down faster. Mine were badly dry rotted by the time I pulled them off. My last car the tires were 6 years old and didn't look half as bad