Thinking about extending my service intervals.

Im assuming you put 10000 miles on in a month? I would keep greasing it every 10000 at least. Do you need a fuel filter that often? If you really want to extend than go 30 that way its every 3 months for a full service and a grease and level check every month. On my truck if l go 45 days instead of 30 days without greasing it it uses another half of a tube. My comfort level is once a month for greasing.

 

Grease jobs are about double what I personally would do. Any trucks my dad owned would get greased every week but he was always running off highway too. Grease is cheap and the extra time you spend under the truck could save you a breakdown one day.

As for engine service, you could probably go longer no problem. Rough math equates running 25k miles at 65 MPH as approx. 380 engine hours. We run most of our engine services on 500 hour intervals with no issues.

 

You'd probably be fine. My old man kind of looked at like we were going to crawl under the trucks anyways to look them over, may as well pack the grease gun under while we're there.

 

This is what oil samples are for. Pull one at 20k and if it looks good extend it out.

 

Base your interval on oil consumption. When it burns a gallon add one to it. When it burns a gallon again then it's time to change it.

 

I watched a few videos of Rawze when he rebuilt his engine. The engine looked really good on the inside, he claims this was bc he changed his oil regularly between 12-15,000 miles. Clean oil is a must he kept repeating.
You can do whatever you feel you gotta do.

 

We did one change a month. That was fine until we approached two changes in a month. DOT got interested in that. As a team we imposed two changes a month. DOT could care less.

I would not stress over 6.3 or 6.5 in fuel mileage. Im pretty certain one nice half a day breezing east across Kansas once a month at 12 mpg will make up for that.