Re: 1st Oil Change Synthetic Not Used??
You do what makes you feel best. Why? Because you only have to live with yourself (well, maybe your family, too). If 5K makes you feel good about caring for your vehicle, that is what you should do.
In 1992, I met a man who taught offensive driving courses for certain agencies with nothing but letters in his name, as well as defensive courses for the rest of us. I don’t recall the make of the car he was driving, but it had about 150,000 miles on it at the time. He changed the oil (Mobil 1 sun) every 25,000 miles, and both oil and filter at 50,000. Several folks in my garage scoffed at this (3K was still pretty prevalent back in those days, 5K was still pretty experimental).
Today, many new cars have an interval of 10K recommended. My VW did. Porsche’s is 20K I think. Toyota is changing to 10K on most of their vehicles. Oil testing has proven that oil can protect MUCH longer than has ever been thought in our younger days. The military has switched to oil analysis, and dropped intervals almost completely, both on vehicles and aircraft.
But here’s a post I have saved that I found, dated back in 2012 on a forum about OCIs.
“I worked in a fleet environment (132 mack tractor trailors) A computer told us when to change it. Average was around 100,000 miles. So yea oil of today isnt the same as oil of yesterday. Even at 100.000 miles the computer would suggest to change it because of carbon build up not because the oil broke down.”
Granted, that’s probably all diesel engines. But 100K miles. And for soot, not because the oil wasn’t “good enough” any longer. 3K, 5K, 10K, 20K... your oil is still protecting your car.
I know I'm a dinosaur, but I have never, (that's never) had an engine problem with any of my vehicles after driving several MILLION miles. I learned one important law for changing engine oil from one clients about 25 years ago. I'm absolutely anal about this one thing and NO, I don't use the mm. I am absolutely religious about changing oil every 5000 miles. This RL has 260,000 miles and still performs as it did the day it came off the showroom. I have no doubt it will easily top 300,000 miles.