The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - L31 break-in

garyd1961 · 02-02-2019, 12:05 AM

I just cranked mine up and kept it at a fast idle for a few minutes, checked gauges, checked for leaks, took it down the road. I changed the oil at 500 miles but I'm pretty sure they didn't change the oil in the trucks that these motors came in until 3000. New cars at work go 10,000 now before an oil change.

02-02-2019, 12:05 AM	#7
garyd1961 Registered User Join Date: May 2016 Location: Henderson NC Posts: 975	Re: L31 break-in I just cranked mine up and kept it at a fast idle for a few minutes, checked gauges, checked for leaks, took it down the road. I changed the oil at 500 miles but I'm pretty sure they didn't change the oil in the trucks that these motors came in until 3000. New cars at work go 10,000 now before an oil change.