I was curious.. I have a 2000 tundra and its got 90000 miles on it. The mechanic said that he got readings of 145 on five and 143 on one.. Is this ok for 90000 miles or is it bad? I have never had any problems with my engine ,now im a little concerned.. Also he idled up my engine a little because he said it would help the oil pressure lubricate the engine better..is this ok or does that sound like good advice? Please advise?