Michael, I read this about diesels that cranking speed is very important. However, the battery is new and strong. We also had another car boosting the battery while cranking. Could the starter lose cranking speed over time?! - I recall we tested interior lights during cranking and they didn't dim, which we deemed as a good indication the starter and the battery are in good shape. But if you folks think that starters can slow down over time, we might need to look into that!